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  • 1151.
    Adami, Rebecca
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Education.
    Bron, Agnieszka
    Stockholm University, Faculty of Social Sciences, Department of Education.
    The Way to Democracy Through Education and Learning in Sweden2007In: Journal für Politische Bildung, ISSN 2191-8244Article in journal (Other academic)
  • 1152.
    Adami, Rebecca
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Education.
    Hållander, Marie
    Stockholm University, Faculty of Social Sciences, Department of Education.
    Testimony and Narrative as a Political Relation: the Question of Ethical Judgment in Education2015In: Journal of Philosophy of Education, ISSN 0309-8249, E-ISSN 1467-9752, Vol. 49, no 1, p. 1-13Article in journal (Refereed)
    Abstract [en]

    In this article, we explore the role of film in educational settings and argue that testimony and narrative are dependent upon each other for developing ethical judgments. We use the film 12 Angry Men to enhance our thesis that the emotional response that sometimes is intended in using film as testimonies in classrooms requires a specific listening; a listening that puts pupils at risk when they relate testimonies to their own life narratives. The article raises the importance of listening in training narrative ethos in relation to violence witnessed in film. The article contributes by enhancing an understanding of a relational dimension to testimony and narrative, which, in an Arendtian sense, is also put forward as a political relation.

  • 1153. Adamo, A.
    et al.
    Smith, L. J.
    Gallagher, J. S.
    Bastian, N.
    Ryon, J.
    Westmoquette, M. S.
    Konstantopoulos, I. S.
    Zackrisson, Erik
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Larsen, S. S.
    Silva-Villa, E.
    Charlton, J. C.
    Weisz, D. R.
    Revealing a ring-like cluster complex in a tidal tail of the starburst galaxy NGC 21462012In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 426, no 2, p. 1185-1194Article in journal (Refereed)
    Abstract [en]

    We report the discovery of a ring-like cluster complex in the starburst galaxy NGC?2146. The Ruby Ring, so named due to its appearance, shows a clear ring-like distribution of star clusters around a central object. It is located in one of the tidal streams that surround the galaxy. NGC?2146 is part of the Snapshot Hubble U-band Cluster Survey (SHUCS). The WFC3/F336W data have added critical information to the available archival Hubble Space Telescope imaging set of NGC?2146, allowing us to determine ages, masses and extinctions of the clusters in the Ruby Ring. These properties have then been used to investigate the formation of this extraordinary system. We find evidence of a spatial and temporal correlation between the central cluster and the clusters in the ring. The latter are about 4?Myr younger than the central cluster, which has an age of 7?Myr. This result is supported by the Ha emission which is strongly coincident with the ring, and weaker at the position of the central cluster. From the derived total Ha luminosity of the system, we constrain the star formation rate density to be quite high (SSFR = 0.47?M??yr-1?kpc-2). The Ruby Ring is the product of an intense and localized burst of star formation, similar to the extended cluster complexes observed in M?51 and the Antennae, but more impressive because it is quite isolated. The central cluster contains only 5 per cent of the total stellar mass in the clusters that are determined within the complex. The ring-like morphology, the age spread and the mass ratio support a triggering formation scenario for this complex. We discuss the formation of the Ruby Ring in a collect and collapse framework. The predictions made by this model agree quite well with the estimated bubble radius and expansion velocity produced by the feedback from the central cluster, making the Ruby Ring an interesting case of triggered star formation.

  • 1154.
    Adamo, Angela
    Stockholm University, Faculty of Science, Department of Astronomy.
    Super Star Clusters in Blue Compact Galaxies: Evidence for a near-infrared flux excess and properties of the starburst phase2011Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Luminous Blue compact galaxies (BCGs) are metal-poor actively star-forming systems, characterised by bright ultraviolet and blue luminosities. Hubble Space Telescope high-resolution data have revealed that the luminous star-forming knots in these galaxies are composed of hundreds of young massive star clusters. In this work we present a systematic study of the star cluster populations in BCGs with important implications for the formation history of their host systems. The studied galaxies show recently increased star formation rates and a high fraction of massive clusters, probably as a result of minor/major merger events. The age distributions have a peak of cluster formation at only 3 - 4 Myr, unveiling a unique sample of clusters still partially embedded. A considerable fraction of clusters (30 - 50 %), mainly younger than 10 Myr, shows an observed flux excess between 0.8 and 2.2 μm. This so-called near-infrared (NIR) excess is impossible to reproduce even with the most recent spectral synthesis models (that include a self-consistent treatment of the photoionized gas). The origin of the NIR excess, which still remains unexplained, challenges our understanding of the cluster formation process under extreme conditions.

    The results achieved in this work have produced important insights into the cluster formation process in BCGs. We suggest that the BCG environment has most likely favoured the compression and collapse of giant molecular clouds into compact massive star clusters. The cluster formation efficiency (i.e., the fraction of star formation happening in star clusters) in BCGs is higher than the reported 8 - 10 %, for quiescent spirals and local star-forming galaxies. Luminous BCGs have a cluster formation efficiency comparable to luminous infrared galaxies and spiral starburst nuclei (the averaged value is  about 30 %), suggesting an important role of the merger event in the cluster formation.

  • 1155.
    Adamo, Angela
    et al.
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Kruijssen, J. M. D.
    Bastian, N.
    Silva-Villa, E.
    Ryon, J.
    Probing the role of the galactic environment in the formation of stellar clusters, using M83 as a test bench2015In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 452, no 1, p. 246-260Article in journal (Refereed)
    Abstract [en]

    We present a study of the M83 cluster population, covering the disc of the galaxy between radii of 0.45 and 4.5 kpc. We aim to probe the properties of the cluster population as a function of distance from the galactic centre. We observe a net decline in cluster formation efficiency (Gamma, i.e. amount of star formation happening in bound clusters) from about 26 per cent in the inner region to 8 per cent in the outer part of the galaxy. The recovered Gamma values within different regions of M83 follow the same Gamma versus star formation rate density relation observed for entire galaxies. We also probe the initial cluster mass function (ICMF) as a function of galactocentric distance. We observe a significant steepening of the ICMF in the outer regions (from -1.90 +/- 0.11 to -2.70 +/- 0.14) and for the whole galactic cluster population (slope of -2.18 +/- 0.07) of M83. We show that this change of slope reflects a more fundamental change of the 'truncation mass' at the high-mass end of the distribution. This can be modelled as a Schechter function of slope -2 with an exponential cutoff mass (M-c) that decreases significantly from the inner to the outer regions (from 4.00 to 0.25 x 10(5) M-circle dot) while the galactic M-c is approximate to 1.60 x 10(5) M-circle dot. The trends in Gamma and ICMF are consistent with the observed radial decrease of the Sigma (H-2), hence in gas pressure. As gas pressure declines, cluster formation becomes less efficient. We conclude that the host galaxy environment appears to regulate (1) the fraction of stars locked in clusters and (2) the upper mass limit of the ICMF, consistently described by a near-universal slope -2 truncated at the high-mass end.

  • 1156.
    Adamo, Angela
    et al.
    Stockholm University, Faculty of Science, Department of Astronomy.
    Ostlin, Goeran
    Stockholm University, Faculty of Science, Department of Astronomy.
    Zackrisson, Erik
    Stockholm University, Faculty of Science, Department of Astronomy.
    Probing Cluster Formation under Extreme Conditions: Super Star Clusters in Blue Compact GalaxiesManuscript (preprint) (Other academic)
    Abstract [en]

    The numerous and massive young star clusters in blue compact galaxies (BCG) are used to investigate the properties of their hosts. We test whether BCGs follow claimed relations between the cluster population and their hosts, such as the cluster specific luminosity in the U band, TL(U), and the star formation rate density ΣSFR; the V bandluminosity of the brightest youngest cluster, Mbrightest, and the mean star formation Vrate (SFR); the cluster formation efficiency versus the ΣSFR. We find that BCGs fairly well reproduce the relations, supporting a scenario where cluster formation and environmental properties of the host are correlated. They occupy, in all the diagrams, the regions of higher SFRs, suggesting the extreme nature of the starburst operating in these systems. We suggest that the BCG environment has most likely favoured the compression and collapse of the giant molecular clouds, enhancing the local star formation efficiency, so that massive clusters have been formed. The cluster formation efficiency (i.e., the fraction of star formation happening in star clusters) in BCGs is higher than the 8-10 % reported from quiescent spirals and dwarf starburst galaxies. BCGs have a cluster formation efficiency comparable to luminous IR galaxies and spiral starburst nuclei (the averaged value is ∼ 30 %).

  • 1157.
    Adamo, Angela
    et al.
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Ryon, J. E.
    Messa, Matteo
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Kim, H.
    Grasha, K.
    Cook, D. O.
    Calzetti, D.
    Lee, J. C.
    Whitmore, B. C.
    Elmegreen, B. G.
    Ubeda, L.
    Smith, L. J.
    Bright, S. N.
    Runnholm, Axel
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Andrews, J. E.
    Fumagalli, M.
    Gouliermis, D. A.
    Kahre, L.
    Nair, P.
    Thilker, D.
    Walterbos, R.
    Wofford, A.
    Aloisi, A.
    Ashworth, G.
    Brown, T. M.
    Chandar, R.
    Christian, C.
    Cignoni, M.
    Clayton, G. C.
    Dale, D. A.
    de Mink, S. E.
    Dobbs, C.
    Elmegreen, D. M.
    Evans, A. S.
    Gallagher, J. S.
    Grebel, E. K.
    Herrero, A.
    Hunter, D. A.
    Johnson, K. E.
    Kennicutt, R. C.
    Krumholz, M. R.
    Lennon, D.
    Levay, K.
    Martin, C.
    Nota, A.
    Östlin, Göran
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Pellerin, A.
    Prieto, J.
    Regan, M. W.
    Sabbi, E.
    Sacchi, E.
    Schaerer, D.
    Schiminovich, D.
    Shabani, F.
    Tosi, M.
    Van Dyk, S. D.
    Zackrisson, E.
    Legacy ExtraGalactic UV Survey with The Hubble Space Telescope: Stellar Cluster Catalogs and First Insights Into Cluster Formation and Evolution in NGC 6282017In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 841, no 2, article id 131Article in journal (Refereed)
    Abstract [en]

    We report the large effort that is producing comprehensive high-level young star cluster (YSC) catalogs for a significant fraction of galaxies observed with the Legacy ExtraGalactic UV Survey (LEGUS) Hubble treasury program. We present the methodology developed to extract cluster positions, verify their genuine nature, produce multiband photometry (from NUV to NIR), and derive their physical properties via spectral energy distribution fitting analyses. We use the nearby spiral galaxy NGC 628 as a test case for demonstrating the impact that LEGUS will have on our understanding of the formation and evolution of YSCs and compact stellar associations within their host galaxy. Our analysis of the cluster luminosity function from the UV to the NIR finds a steepening at the bright end and at all wavelengths suggesting a dearth of luminous clusters. The cluster mass function of NGC 628 is consistent with a power-law distribution of slopes similar to-2 and a truncation of a few times 10(5) M-circle dot. After their formation, YSCs and compact associations follow different evolutionary paths. YSCs survive for a longer time frame, confirming their being potentially bound systems. Associations disappear on timescales comparable to hierarchically organized star-forming regions, suggesting that they are expanding systems. We find massindependent cluster disruption in the inner region of NGC 628, while in the outer part of the galaxy there is little or no disruption. We observe faster disruption rates for low mass (<= 10(4) M-circle dot) clusters, suggesting that a massdependent component is necessary to fully describe the YSC disruption process in NGC 628.

  • 1158.
    Adamo, Angela
    et al.
    Stockholm University, Faculty of Science, Department of Astronomy.
    Zackrisson, Erik
    Stockholm University, Faculty of Science, Department of Astronomy.
    Östlin, Göran
    Stockholm University, Faculty of Science, Department of Astronomy.
    Hayes, M.
    Observatory of Geneva, Switzerland.
    On the Origin of the Red Excess in Very Young Super Star Clusters: The Case of SBS 0335-052E2010In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 725, no 2, p. 1620-1628Article in journal (Refereed)
    Abstract [en]

    The spectral energy distribution analysis of very young unresolved star clusters challenges our understanding of the cluster formation process. Studies of resolved massive clusters in the Milky Way and in the nearby Magellanic Clouds show us that the contribution from photoionized gas is very important during the first Myr of cluster evolution. We present our models which include both a self-consistent treatment of the photoionized gas and the stellar continuum and quantify the impact of such a nebular component on the total flux of young unresolved star clusters. A comparison with other available models is considered. The very young star clusters in the SBS 0335-052E dwarf starburst galaxy are used as a test for our models. Due to the low metallicity of the galactic medium our models predict a longer lasted nebular phase which contributes between 10% and 40% of the total near-infrared (NIR) fluxes at around 10 Myr. We thus propose a possible solution for the observed flux excess in the six bright super star clusters (SSCs) of SBS 0335-052E. Reines et al. showed that the observed cluster fluxes, in the red-optical and NIR range, sit irreconcilably above the stellar continuum models provided. We find that in the age range estimated from the Hα emission we can explain the red excess in all six SSCs as due to nebular emission, which at cluster ages around 10 Myr still affects the NIR wavebands substantially.

  • 1159. Adamo, Angela
    et al.
    Östlin, Göran
    Stockholm University, Faculty of Science, Department of Astronomy.
    Bastian, N.
    Zackrisson, Erik
    Stockholm University, Faculty of Science, Department of Astronomy.
    Livermore, R. C.
    Guaita, Lucia
    Stockholm University, Faculty of Science, Department of Astronomy.
    HIGH-RESOLUTION STUDY OF THE CLUSTER COMPLEXES IN A LENSED SPIRAL AT REDSHIFT 1.5: CONSTRAINTS ON THE BULGE FORMATION AND DISK EVOLUTION2013In: Astrophysical Journal, ISSN 0004-637X, E-ISSN 1538-4357, Vol. 766, no 2, p. 105-Article in journal (Refereed)
    Abstract [en]

    We analyze the clump population of the spiral galaxy Sp 1149 at redshift 1.5. Located behind the galaxy cluster MACS J1149.5+2223, Sp 1149 has been significantly magnified allowing us to study the galaxy on physical scales down to similar to 100 pc. The galaxy cluster frame is among the targets of the Cluster Lensing And Supernova survey with Hubble (CLASH), an ongoing Hubble Space Telescope (HST) Multi-Cycle Treasury program. We have used the publicly available multi-band imaging data set to reconstruct the spectral energy distributions of the clumps in Sp 1149, and derive, by means of stellar evolutionary models, their physical properties. We found that 40% of the clumps observed in Sp 1149 are older than 30 Myr and can be as old as 300 Myr. These are also the more massive (luminous) clumps in the galaxy. Among the complexes in the local reference sample, the star-forming knots in luminous blue compact galaxies could be considered progenitor analogs of these long-lived clumps. The remaining 60% of clumps have colors comparable to local cluster complexes, suggesting a similar young age. We observe that the Sp 1149 clumps follow the M proportional to R-2 relation similar to local cluster complexes, suggesting similar formation mechanisms although they may have different initial conditions (e.g., higher gas surface densities). We suggest that the galaxy is experiencing a slow decline in star formation rate and a likely transitional phase toward a more quiescent star formation mode. The older clumps have survived between 6 and 20 dynamical times and are all located at projected distances smaller than 4 kpc from the center. Their current location suggests migration toward the center and the possibility of being the building blocks of the bulge. On the other hand, the dynamical timescale of the younger clumps is significantly shorter, meaning that they are quite close to their birthplace. We show that the clumps of Sp 1149 may account for the expected metal-rich globular cluster population usually associated with the bulge and thick disk components of local spirals.

  • 1160.
    Adamo, Angela
    et al.
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Östlin, Göran
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Zackrisson, Erik
    Stockholm University, Faculty of Science, Department of Astronomy.
    Probing cluster formation under extreme conditions: massive star clusters in blue compact galaxies2011In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 417, no 3, p. 1904-1912Article in journal (Refereed)
    Abstract [en]

    The numerous and massive young star clusters in blue compact galaxies (BCGs) are used to investigate the properties of their hosts. We test whether BCGs follow claimed relations between cluster populations and their hosts, such as the fraction of the total luminosity contributed by the clusters as function of the mean star formation rate (SFR) density, the V-band luminosity of the brightest youngest cluster as related to the mean host SFR and the cluster formation efficiency (i.e. the fraction of star formation happening in star clusters) versus the density of the SFR. We find that BCGs follow the trends, supporting a scenario where cluster formation and environmental properties of the host are correlated. They occupy, in all the diagrams, the regions of higher SFRs, as expected by the extreme nature of the starbursts operating in these systems. We find that the star clusters contribute almost to the 20 per cent of the UV luminosity of the hosts. We suggest that the BCG starburst environment has most likely favoured the compression and collapse of the giant molecular clouds, enhancing the local star formation efficiency, so that massive clusters have been formed. The estimated cluster formation efficiency supports this scenario. BCGs have a cluster formation efficiency comparable to luminous IR galaxies and spiral starburst nuclei (the averaged value is similar to 35 per cent) which is much higher than the 8-10 per cent reported for quiescent spirals and dwarf star-forming galaxies.

  • 1161.
    Adamo, Angela
    et al.
    Stockholm University, Faculty of Science, Department of Astronomy.
    Östlin, Göran
    Stockholm University, Faculty of Science, Department of Astronomy.
    Zackrisson, Erik
    Stockholm University, Faculty of Science, Department of Astronomy.
    Probing the near-IR flux excess in young star clusters2011Conference paper (Refereed)
    Abstract [en]

    We report the results of a recent study of young star clusters (YSCs) in luminous blue compact galaxies (BCGs). The age distributions of the YSCs suggest that the starburst episode in Haro 11, ESO 185-IG13, and Mrk 930 started not more than 30-40 Myr ago. A peak of cluster formation only 3 - 4 Myr old is observed, unveiling a unique sample of clusters still partially embedded. A considerable fraction of clusters (30 - 50%), mainly younger than 10 Myr, shows an observed flux excess between 0.8 and 2.2 micron. This so-called near-infrared (NIR) excess is impossible to reproduce even with the most recent spectral synthesis models (that include a self-consistent treatment of the photoionized gas). We have used these YSCs to probe the very early evolution phase of star clusters. In all the three host galaxies, the analysis is limited to the optically brightest objects, i.e., systems that are only partially embedded by their natal cocoons (since deeply embedded clusters are probably too faint to be detected). We discuss possible explanations for this NIR excess, in the context of IR studies of both extragalactic young star clusters and resolved massive star forming regions in the Milky Way and in the nearby Magellanic Clouds.

  • 1162.
    Adamo, Angela
    et al.
    Stockholm University, Faculty of Science, Department of Astronomy.
    Östlin, Göran
    Stockholm University, Faculty of Science, Department of Astronomy.
    Zackrisson, Erik
    Stockholm University, Faculty of Science, Department of Astronomy.
    Hayes, Matthew
    The Extremely Young Star Cluster Population In Haro 112010In: Galaxy Wars: Star Formation and Stellar Populations in Interacting Galaxies / [ed] Beverly Smith, James Higdon, Sarah Higdon, and Nathan Bastian, San Francisco: Astronomical Society of the Pacific , 2010, p. 74-Conference paper (Refereed)
    Abstract [en]

    We have performed a deep multi-band photometric analysis of the star cluster population of Haro 11. This starburst galaxy (log L_FUV = 10.3 L_sun) is considered a nearby analogue of Lyman break galaxies (LBGs) at high redshift. The study of the numerous star clusters in the systems is an effective way to investigate the formation and evolution of the starburst phase. In fact, the SED fitting models have revealed a surprisingly young star cluster population, with ages between 0.5 and 40 Myr, and estimated masses between 10^3 and 10^7 solar masses. An independent age estimation has been done with the EW(Halpha) analysis of each cluster. This last analysis has confirmed the young ages of the clusters. We noticed that the clusters with ages between 1 and 10 Myr show a flux excess in H (NIC3/F160W) and/or I (WFPC2/F814W) bands with respect to the evolutionary models. Once more Haro 11 represents a challenge to our understanding.

  • 1163.
    Adamo, Angela
    et al.
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Östlin, Göran
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Zackrisson, Erik
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Hayes, Matthew
    The Massive Star Clusters in the Dwarf Merger ESO 185-IG13: is the Red Excess Ubiquitous in Starbursts?2011In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 414, no 3, p. 1793-1812Article in journal (Other academic)
    Abstract [en]

    We have investigated the starburst properties of the luminous blue compact galaxy ESO 185-IG13. The galaxy has been imaged with the high resolution cameras onboard to the Hubble Space Telescope. From the UV to the IR, the data reveal a system shaped by hundreds of young star clusters, and fine structures, like a tidal stream and a shell. The presence of numerous clusters and the perturbed morphology indicate that the galaxy has been involved in a recent merger event. Using previous simulations of shell formation in galaxy mergers we constrain potential progenitors of ESO 185-IG13. The analysis of the star cluster population is used to investigate the properties of the present starburst and to date the final merger event, which has produced hundreds of clusters younger than 100 Myr. We have found a peak of cluster formation only 3.5 Myr old. A large fraction of these clusters will not survive after 10-20 Myr, due to the "infant mortality" caused by gas expulsion. However, this sample of clusters represents an unique chance to investigate the youngest phases of cluster evolution. As already observed in the analog blue compact galaxy Haro 11, a fraction of young clusters are affected by a flux excess at wavelengths longer than 8000 \AA. Ages, masses, and extinctions of clusters with this NIR excess are estimated from UV and optical data. We discuss similarities and differences of the observed NIR excess in ESO 185-IG13 clusters with other cases in the literature. The cluster ages and masses are used to distinguish among the potential causes of the excess. We observe, as in Haro 11, that the use of the IR and the (commonly used) I band data results in overestimates of age and mass in clusters affected by the NIR excess. This has important implications for a number of related studies of star clusters.

  • 1164.
    Adamo, Angela
    et al.
    Stockholm University, Faculty of Science, Department of Astronomy.
    Östlin, Göran
    Stockholm University, Faculty of Science, Department of Astronomy.
    Zackrisson, Erik
    Hayes, Matthew
    Tracing the star formation history of three Blue Compact galaxies through the analysis of their star clusters2009Conference paper (Other (popular science, discussion, etc.))
    Abstract [en]

    We present preliminary results from a study of the compact star cluster populations in three local luminous blue compact galaxies: ESO 185-IG 013, ESO 350-IG 038 (a.k.a. Haro 11), and MRK 930. These systems show peculiar morphologies and the presence of hundreds of SCs that have been produced by the past, recent, and/or current starburst phases. We use a complete set of HST images ranging from the UV to IR for each galaxy. Deep images in V (WFPC2/f606w) and I (WFPC2/f814w) are used to capture most of the star cluster candidates up to the old ones (fainter) which have had, in the past, less possibility to be detected. The other bands are used in the SED fitting technique for constraining ages and masses. Our goals are to investigate the evolution of these three blue compact galaxies and the star cluster formation impact on their star formation history.

  • 1165.
    Adamo, Angela
    et al.
    Stockholm University, Faculty of Science, Department of Astronomy.
    Östlin, Göran
    Stockholm University, Faculty of Science, Department of Astronomy.
    Zackrisson, Erik
    Stockholm University, Faculty of Science, Department of Astronomy.
    Hayes, Matthew
    Observatoire Astronomique de l'Université de Genève.
    Cumming, Robert
    Stockholm University, Faculty of Science, Department of Astronomy.
    Micheva, Genoveva
    Stockholm University, Faculty of Science, Department of Astronomy.
    Super star clusters in Haro 11: properties of a very young starburst and evidence for a near-infrared flux excess2010In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, MNRAS, Vol. 407, no 2, p. 870-890Article in journal (Refereed)
    Abstract [en]

    We have used multiband imaging to investigate the nature of an extreme starburst environment in the nearby Lyman break galaxy analogue Haro 11 (ESO350-IG038) by means of its stellar cluster population. The central starburst region has been observed in eight different high-resolution Hubble Space Telescope (HST) wavebands, sampling the stellar and gas components from UV to near-infrared. Photometric imaging of the galaxy was also carried out at 2.16μm by NaCo AO instrument at the ESO Very Large Telescope. We constructed integrated spectral energy distributions (SEDs) for about 200 star clusters located in the active star-forming regions and compared them with single stellar population models (suitable for physical properties of very young cluster population) in order to derive ages, masses and extinctions of the star clusters. The cluster age distribution we recover confirms that the present starburst has lasted for 40Myr, and shows a peak of cluster formation only 3.5 Myr old. With such an extremely young cluster population, Haro 11 represents a unique opportunity to investigate the youngest phase of the cluster formation process and evolution in starburst systems. We looked for possible relations between cluster ages, extinctions and masses. Extinction tends to diminish as a function of the cluster age, but the spread is large and reaches the highest dispersion for clusters in partial embedded phases (<5Myr). A fraction of low-mass (below 104 Msolar), very young (1-3Myr) clusters is missing, either because they are embedded in the parental molecular cloud and heavily extinguished, or because of blending with neighbouring clusters. The range of the cluster masses is wide; we observe that more than 30 per cent of the clusters have masses above 105 Msolar, qualifying them as super star clusters. Almost half of the cluster sample is affected by flux excesses at wavelengths >8000Å which cannot be explained by simple stellar evolutionary models. Fitting SED models over all wavebands leads to systematic overestimates of cluster ages and incorrect masses for the stellar population supplying the light in these clusters. We show that the red excess affects also the HST F814W filter, which is typically used to constrain cluster physical properties. The clusters which show the red excess are younger than 40Myr we discuss possible physical explanations for the phenomenon. Finally, we estimate that Haro 11 has produced bound clusters at a rate almost a factor of 10 higher than the massive and regular spirals, like the Milky Way. The present cluster formation efficiency is ~38 per cent of the galactic star formation rate.

  • 1166.
    Adamo, Angela
    et al.
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Östlin, Göran
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Zackrisson, Erik
    Stockholm University, Faculty of Science, Department of Astronomy.
    Papaderos, P.
    Bergvall, N.
    Rich, R. M.
    Micheva, Genoveva
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Star cluster formation and evolution in Mrk 930: properties of a metal-poor starburst2011In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 415, no 3, p. 2388-2406Article in journal (Refereed)
    Abstract [en]

    We present the analysis of the large population of star clusters in the blue compact galaxy (BCG) Mrk 930. The study has been conducted by means of a photometric analysis of multiband data obtained with the Hubble Space Telescope (HST). We have reconstructed the spectral energy distributions of the star clusters and estimated the age, mass and extinction for a representative sample. Similar to previous studies of star clusters in BCGs, we observe a very young cluster population with 70 per cent of the systems formed less than 10 Myr ago. In Mrk 930, the peak in the star cluster age distribution at 4 Myr is corroborated by the presence of Wolf-Rayet spectral features, and by the observed optical and infrared (IR) line ratios [OIII]/H beta and [Ne III]/[Ne II]. The recovered extinction in these very young clusters shows large variations, with a decrease at older ages. It is likely that our analysis is limited to the optically brightest objects (i.e. systems only partially embedded in their natal cocoons; the deeply embedded clusters being undetected). We map the extinction across the galaxy using low-resolution spectra and the H alpha-to-H beta ratio, as obtained from ground-based narrow band imaging. These results are compared with the extinction distribution recovered from the clusters. We find that the mean optical extinction derived in the starburst regions is close to the averaged value observed in the clusters [more than 80 per cent of the systems have E(B - V) <= 0.2mag], but locally, do not trace the more extinguished clusters. Previous HST studies of BCGs have revealed a population of young and extremely red super star clusters. We detect a considerable fraction of clusters affected by a red excess also in Mrk 930. The nature of the red excess, which turns up at near-IR wavelengths (I band and longwards), remains unknown. We compare the cluster formation history and the star formation history, the latter derived from the fit of spectral population synthesis models to the spectra. We find a general agreement between the two independently estimated quantities. Using the cluster properties, we perform a study of the host environmental properties. We find that the cluster formation efficiency (the fraction of star formation happening in clusters) is significantly higher, suggesting a key role of the environment for the formation of these massive objects.

  • 1167.
    Adamow, Goscha
    Stockholm University, Faculty of Social Sciences, Department of Education.
    Förskolan i ett mångkulturellt samhälle: Pedagogers föreställningar kring mångkulturellt arbete på förskolan2010Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The purpose of this study was to describe, understand and analyze the thought behind the perception amongst pedagogues´ on multicultural work in preschools, based on an intercultural perspective. In this study, I questioned the pedagogues´ view on the work in preschools that prepares children for a life in a multicultural society and also the way they describe the cultural challenges.

    The study was accomplished and questions were answered by studying current literature and previous research in the field. I also interviewed four pedagogues from two different preschools located in separate areas.

    This study shows that many opinions that pedagogues expressed in the interviews can be traced back to an “us vs. them” perspective, in which your own culture, the Swedish one in this case, is the most critical and should receive the greatest attention in preschool. At the same time, the study shows that the more experience pedagogues had from multicultural preschools the greater acceptance they had for other cultures. These pedagogues also had an advanced in the development of intercultural competence.

     

  • 1168. Adams, John
    et al.
    Pike, Tim
    Corna, Laurie M.
    Platts, Loretta G.
    Stockholm University, Faculty of Social Sciences, Stress Research Institute.
    Worts, Diana
    McDonough, Peggy
    Di Gessa, Giorgio
    Sacker, Amanda
    Glaser, Karen
    Price, Debora
    How do female lifecourses affect income in retirement?2016Report (Other academic)
    Abstract [en]

    This Briefing Note examines the influence of various lifecourses on income in retirement. The primary focus of this note is to consider how women’s retirement income is affected by motherhood. This includes the impact of taking time out of work to care for children, as well as the implications of the Motherhood Penalty, which is the observation that mothers tend to have reduced incomes relative to women without children.

  • 1169.
    Adams, Jonathan
    Stockholm University, Faculty of Humanities.
    Ships, innovation and social change: aspects of carvel shipbuilding in northern Europe 1450-18502003Doctoral thesis, monograph (Other academic)
  • 1170. Adams, Jonathan
    et al.
    Heß, Cordelia
    Stockholm University, Faculty of Humanities, Centre for Medieval Studies. Stockholm University, Faculty of Humanities, Department of History.
    Fear and Loathing in the North: Muslims and Jews in Medieval Scandinavia and the Baltic Region2013Report (Other academic)
  • 1171.
    Adams Lyngbäck, Elizabeth
    Stockholm University, Faculty of Social Sciences, Department of Education.
    I Don't Feel Like Myself: Women's Accounts of Normality and Authenticity in the Field of Menstruation2010Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    The aim of this master thesis is to contribute to a deeper understanding of women’s experiences in regard to menstrually related suffering. These particular experiences are examined in relation to notions of normality and authenticity. The study designed for this purpose is based on the life world of women in order to explore these ideas. The visceral signs originating from within the body are generally understood to be undetectable when working properly. Such is not the case for many women who menstruate. The cyclical change in physical and mental states associated with the menstrual cycle provide an opportunity to study how going in and out of different ways of being in the world influence human experience. Thematic interviews were conducted asking ten women living in Sweden to share their experiences of suffering related to the menstrual cycle. A phenomenological approach with focus on the body was used to study how changing ways of being in the world contribute to the construction of illness and health. Beginning with discussions about their experiences of suffering revealed that women thought in terms of when they felt like themselves and when they did not. Organization of time was interrelated with how women understood their experiences. Emphasizing recurring negative experiences lead to contemplation about causes of suffering and comparison of different states of being. The lack of ‘one’s selfness’ due to what is commonly referred to as PMS represents the dilemma these women describe. The need to have control over the outward representation of one’s self is discussed in light of different medical technologies like SSRI antidepressant use and hormonal therapies which revealed that women saw the origins of their suffering to be a product of society but tightly connected to their identity as women and were not willing to be without a menstrual cycle. Phenomenological ideas about embodiment were used to understand how suffering was seen both as a sign of health and as a part of the self.

  • 1172.
    Adams Lyngbäck, Liz
    Stockholm University, Faculty of Social Sciences, Department of Education.
    Experiences, networks and uncertainty: parenting a child who uses a cochlear implant2016Doctoral thesis, monograph (Other academic)
    Abstract [en]

    The aim of this dissertation project is to describe the ways people experience parenting a deaf child who uses a cochlear implant. Within a framework of social science studies of disability this is done by combining approaches using ethnographic and netnographic methods of participant observation with an interview study. Interpretations are based on the first-person perspective of 19 parents against the background of their related networks of social encounters of everyday life. The netnographic study is presented in composite conversations building on exchanges in 10 social media groups, which investigates the parents’ meaning-making in interaction with other parents with similar living conditions. Ideas about language, technology, deafness, disability, and activism are explored. Lived parenting refers to the analysis of accounts of orientation and what 'gets done' in respect to these ideas in situations where people utilize the senses differently. In the results, dilemmas surrounding language, communication and cochlear implantation are identified and explored. The dilemmas extend from if and when to implant, to decisions about communication modes, intervention approaches, and schools. An important finding concerns the parents’ orientations within the dilemmas, where most parents come up against antagonistic conflicts. There are also examples found of a development process in parenting based on lived, in-depth experiences of disability and uncertainty which enables parents to transcend the conflictive atmosphere. This process is analyzed in terms of a social literacy of dis/ability.

  • 1173. Adams, S. M.
    et al.
    Blagorodnova, N.
    Kasliwal, M. M.
    Amanullah, Rahman
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Barlow, T.
    Bue, B.
    Bulla, Mattia
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Cao, Y.
    Cenko, S. B.
    Cook, D. O.
    Ferretti, Raphael
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Fox, O. D.
    Fremling, Christoffer
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Gezari, S.
    Goobar, Ariel
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Ho, A. Y. Q.
    Hung, Tiara
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Karamehmetoglu, Emir
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Kulkarni, S. R.
    Kupfer, T.
    Laher, R. R.
    Masci, F. J.
    Miller, A. A.
    Neill, J. D.
    Nugent, P. E.
    Sollerman, Jesper
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Taddia, Francesco
    Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Walters, R.
    iPTF Survey for Cool Transients2018In: Publications of the Astronomical Society of the Pacific, ISSN 0004-6280, E-ISSN 1538-3873, Vol. 130, no 985, article id 034202Article in journal (Refereed)
    Abstract [en]

    We performed a wide-area (2000 deg2) g and I band experiment as part of a two month extension to the Intermediate Palomar Transient Factory. We discovered 36 extragalactic transients including iPTF17lf, a highly reddened local SN Ia, iPTF17bkj, a new member of the rare class of transitional Ibn/IIn supernovae, and iPTF17be, a candidate luminous blue variable outburst. We do not detect any luminous red novae and place an upper limit on their rate. We show that adding a slow-cadence I band component to upcoming surveys such as the Zwicky Transient Facility will improve the photometric selection of cool and dusty transients.

  • 1174. Adams, Vanessa M.
    et al.
    Moon, Katie
    Alvarez-Romero, Jorge G.
    Bodin, Örjan
    Stockholm University, Faculty of Science, Stockholm Resilience Centre.
    Spencer, Michaela
    Blackman, Deborah
    Using Multiple Methods to Understand the Nature of Relationships in Social Networks2018In: Society & Natural Resources, ISSN 0894-1920, E-ISSN 1521-0723, Vol. 31, no 7, p. 755-772Article in journal (Refereed)
    Abstract [en]

    Effective natural resource management (NRM) often depends on collaboration through formal and informal relationships. Social network analysis (SNA) provides a framework for studying social relationships; however, a deeper understanding of the nature of these relationships is often missing. By integrating multiple analytical methods (including SNA, evidence ratings, and perception matrices), we were able to investigate the nature of relationships in NRM social networks across five service types (e.g., technical advice, on-ground support) in our case study region, Daly catchment Australia. Only one service type was rated as highly associated with free choice in establishing relationships: technical advice/knowledge. Beneficial characteristics of NRM organizations, such as collaborative and transparent, were associated with the presence of freely chosen relationships between organizations. Our results suggest a need to improve our understanding of organizational roles and characteristics, in particular for use in applied NRM contexts, such as network weaving or disseminating information.

  • 1175.
    Adamson Jungstedt, Olge
    Stockholm College.
    The petrology of the Norra Kärr district: an occurrence of alkaline rocks in southern Sweden1944Doctoral thesis, monograph (Other academic)
  • 1176.
    Adamson, Lena
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Education.
    Gougoulakis, Petros
    Stockholm University, Faculty of Social Sciences, Department of Education.
    Swedish Quality Assurance of Higher Education: From Enhancement to Results Control and Back to Enhancement?2017In: Quality Assurance in Higher Education: A Global Perspective / [ed] Stamelos Georgios, K.M. Joshi, Saeed Paivandi, Studera Press , 2017, p. 19-40Chapter in book (Refereed)
    Abstract [en]

    This article outlines the Swedish national quality assurance system of higher education institutions, placing it in a historical and international context. Currently a new system is under construction as a result of heavy criticism of the system applied since 2011. What the new system will precisely confer is too early to tell. Its ambition is to align with the principles (European Standards and Guidelines; ESG 2015) that have been developed within the frame of the Bologna Process.

  • 1177.
    Adamsson, Alexander
    Stockholm University, Faculty of Law, Department of Law.
    Bolagsledningens skadeståndsansvar i dualistiskt organiserade europabolag2013Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
  • 1178.
    Adamsson, Emelie
    et al.
    Stockholm University, Faculty of Humanities, Department of Journalism, Media and Communication (JMK).
    Nilsson, Emma
    Stockholm University, Faculty of Humanities, Department of Journalism, Media and Communication (JMK).
    ”Storyn” och ”Cocktailpartyt”: En kvalitativ jämförelse av Max och Saltå Kvarns miljö- och hållbarhetskommunikation2010Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    SYFTE: Uppsatsens syfte är att undersöka drivkrafterna bakom företags miljö- och hållbarhetskommunikation. Vi vill även visa på betydelsen av trovärdighetsfrågan i relation till kommersiella intressen och hur den påverkar kommunikationen. Studien fokuseras till Max och Saltå Kvarns avsändarperspektiv med avsikt att jämföra och kontrastera hur företagen kommunicerar sina miljöidentiteter.TEORETISK RAM: Den teoretiska ramen bygger på CSR, Miljöidentitet och Miljö- och hållbarhetskommunikation med begreppen trovärdighet, transparens och tonalitet. METOD: Jämförande fallstudie och halvstrukturerade kvalitativa intervjuer med nyckelpersoner på företagen. SLUTSATSER: Max och Saltå Kvarns olika utgångslägen är den största bidragande orsaken till skillnaderna mellan företagens miljö- och hållbarhetskommunikation och påverkar både drivkrafterna samt miljöidentiteternas utformning. Max som miljöanpassad snabbmatsaktör och Saltå Kvarn som drivs av ekologisk och biodynamisk framställning uttalar visionära miljö- och hållbarhetsmål. Båda företagen strävar efter dialogorienterad miljö- och hållbarhetskommunikation och undviker marknadsföring i form av köpt medialt utrymme. Istället används informella kanaler i olika utsträckning. Saltå Kvarn möter sina intressenter genom sociala medier som ett ”cocktailparty” medan Max främst vill berätta sin ”story” i restaurangerna och i anslutning till politiska sammanhang. Gemensamt för både Max och Saltå Kvarn är att deras miljö- och hållbarhetskommunikation kan ses som legitimitetsåtgärder som möjliggör företagens expansionsfaser.

  • 1179. Adamsson Wahren, C.
    et al.
    Byqvist, S.
    Olsson, Börje
    Stockholm University, Faculty of Social Sciences, Centre for Social Research on Alcohol and Drugs (SoRAD).
    Det tunga narkotikamissbrukets omfattning i Sverige 19982001Report (Other academic)
  • 1180.
    Adamus-Gorka, Magdalena
    et al.
    Stockholm University, Faculty of Science, Medical Radiation Physics (together with KI).
    Brahme, Anders
    Stockholm University, Faculty of Science, Medical Radiation Physics (together with KI).
    Mavroidis, Panayiotis
    Stockholm University, Faculty of Science, Medical Radiation Physics (together with KI).
    Lind, Bengt K
    Stockholm University, Faculty of Science, Medical Radiation Physics (together with KI).
    Determination of the dose-response relations of thoracic and cervical myelopathy after external beam radiation therapy2007In: 9th Biennial ESTRO Meeting on Physics and Radiation Technology for Clinical Radiotherapy, Barcelona, Spain, 9-13 September 2007, 2007Conference paper (Other academic)
    Abstract [en]

    Following our previous experience, the relative seriality model

    was fitted to two different sets of clinical data for radiation myelitis concerning thoracic spinal cord after radiation treatment of 43 patients with lung carcinoma and cervical spinal cord after treating 248 patients for malignant disease of head and neck.

    Individual treatment data were suitably fitted by the relative seriality model. The estimated radiobiological parameters of the model indicate that the probability of inducing this complication after radiation therapy is volume dependent only for the cervical part of spinal cord, whereas for the thoracic part no volume effect could be observed.

    Two different statistical methods applied to the patient material showed that the radiobiological model and the estimated parameters can be used to closely predict the complication rates observed.

  • 1181.
    Adamus-Gorka, Magdalena
    et al.
    Stockholm University, Faculty of Science, Medical Radiation Physics (together with KI).
    Mavroidis, Panayiotis
    Stockholm University, Faculty of Science, Medical Radiation Physics (together with KI).
    Brahme, Anders
    Stockholm University, Faculty of Science, Medical Radiation Physics (together with KI).
    Lind, Bengt K
    Stockholm University, Faculty of Science, Medical Radiation Physics (together with KI).
    An “Effective functional subunit size” model for the dose response of rat spinal cord paralysis2007In: 13th International Congress of Radiation Research, San Fransisco, USA, July 8-12, 2007, 2007Conference paper (Other (popular science, discussion, etc.))
    Abstract [en]

    Background: Radiobiological models for normal tissue complication probability (NTCP) are more and more commonly used in order to estimate the clinical outcome of radiation therapy. A normal tissue complication probability model to be considered a good and reliable one should fulfill the following two requirements: (a) it should predict the sigmoid shape of the dose-response curve as well as possible and (b) it should duly handle the volume effect. In the work from 2005 (IJROBP 61(3):892-900, 2005) P. van Luijk et al. suggest that none of the existing NTCP models is able to describe the volume effects present in the rat spinal cord during irradiation with small proton beams and they indicate the need for developing such new models.

    Methods: We have used the experimental data from H. Bijl et al. (IJROBP 52(1):205-211, 2002) to try explaining the change in the fifty percent effective dose (ED50) for different field sizes. We initiated this study to evaluate whether the induction of white matter necrosis in rat spinal cord after irradiation with small proton beams could be explained independent of used NTCP model. We therefore introduced a new concept of effective FSU dose, where a convolution of the original dose distribution with a function describing the effective size of a single FSU results in the average doses in a functional subunit. Such procedure allows determining the ED50 in an FSU of a certain size, within the irradiation field. We have also looked at non uniform dose distributions to see whether using a similar method we can explain the so called “bath and shower experiments” (IJROBP 57(1): 274-281, 2003).

    Results: Using the least square method to compare the effective doses for different sizes of functional subunits with the experimental data we observe the best fit for about 8 mm length. It seems that this length could be understood as an effective size of functional subunits in rat spinal cord, explaining what is otherwise interpreted as a volume effect. For the non uniform dose distributions an effective FSU length of 5 mm gives the optimal fit with the Probit dose-response model.

    Conclusions: The concept of an effective FSU length seems to explain at least part of the effects seen when small portions of the rat spinal cord are irradiated. The most likely FSU length for the shower and bath experiments is 5 mm according to these calculations.

  • 1182.
    Adamus-Górka, Magdalena
    Stockholm University, Faculty of Science, Medical Radiation Physics (together with KI).
    Improved dose response modeling for normal tissue damage and therapy optimization2008Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    The present thesis is focused on the development and application of dose response models for radiation therapy. Radiobiological models of tissue response to radiation are an integral part of the radiotherapeutic process and a powerful tool to optimize tumor control and minimize damage to healthy tissues for use in clinical trials. Ideally, the models could work as a historical control arm of a clinical trial eliminating the need to randomize patents to suboptimal therapies. In the thesis overview part, some of the basic properties of the dose response relation are reviewed and the most common radiobiological dose-response models are compared with regard to their ability to describe experimental dose response data for rat spinal cord using the maximum likelihood method. For vascular damage the relative seriality model was clearly superior to the other models, whereas for white matter necrosis all models were quite good except possibly the inverse tumor and critical element models. The radiation sensitivity, seriality and steepness of the dose-response relation of the spinal cord is found to vary considerably along its length. The cervical region is more radiation sensitive, more parallel, expressing much steeper dose-response relation and more volume dependent probability of inducing radiation myelitis than the thoracic part. The higher number of functional subunits (FSUs) consistent with a higher amount of white matter close to the brain may be responsible for these phenomena. With strongly heterogeneous dose delivery and due to the random location of FSUs, the effective size of the FSU and the mean dose deposited in it are of key importance and the radiation sensitivity distribution of the FSU may be an even better descriptor for the response of the organ. An individual optimization of a radiation treatment has the potential to increase the therapeutic window and improve cure for a subgroup of patients.

  • 1183.
    Adamus-Górka, Magdalena
    et al.
    Stockholm University, Faculty of Science, Medical Radiation Physics (together with KI).
    Brahme, Anders
    Mavroidis, Panayiotis
    Lind, Bengt K.
    Variation in radiation sensitivity and repair kinetics in different parts of the spinal cord2008In: Acta Oncologica, ISSN 1651-226X (electronic) 0284-186X (paper), p. 1-9Article in journal (Refereed)
  • 1184.
    Adamus-Górka, Magdalena
    et al.
    Stockholm University, Faculty of Science, Medical Radiation Physics (together with KI).
    Mavroidis, Panayiotis
    Brahme, Anders
    Lind, Bengt K.
    The dose response relation for rat spinal cord paralysis analyzed in terms of the effective size of the functional subunitManuscript (Other academic)
  • 1185.
    ADANE, DAWIT
    Stockholm University, Faculty of Social Sciences, Department of Sociology.
    Risk of First Contraception among Ethiopian Women2013Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Abstract: In this study, I examine the risk of first contraception among Ethiopian women. I use the 2005 Ethiopian Demographic and Health Survey and apply Continuous-Time Event-History Analysis to follow women from age ten to the time of first use or at the interview, whichever comes first.

     

    The multivariate analyses by controlling all variables show that risks for first contraception are higher at higher parities, at younger and older ages, for Orthodox religion followers, the Tigrie ethnic group, women who completed primary education, in the Benishangul-Gumuz and Gambela regions and in urban areas and for younger cohorts.

  • 1186. Adase, Christopher A.
    et al.
    Draheim, Roger R.
    Stockholm University, Faculty of Science, Department of Biochemistry and Biophysics.
    Manson, Michael D.
    The Residue Composition of the Aromatic Anchor of the Second Transmembrane Helix Determines the Signaling Properties of the Aspartate/Maltose Chemoreceptor Tar of Escherichia coli2012In: Biochemistry, ISSN 0006-2960, E-ISSN 1520-4995, Vol. 51, no 9, p. 1925-1932Article in journal (Refereed)
    Abstract [en]

    Repositioning of the tandem aromatic residues (Trp-209 and Tyr-210) at the cytoplasmic end of the second transmembrane helix (TM2) modulates the signal output of the aspartate/maltose chemoreceptor of Escherichia coli (Tar(Ec)). Here, we directly assessed the effect of the residue composition of the aromatic anchor by studying the function of a library of Tar(Ec) variants that possess all possible combinations of Ala, Phe, Tyr, and Trp at positions 209 and 210. We identified three important properties of the aromatic anchor. First, a Trp residue at position 209 was required to maintain clockwise (CW) signal output in the absence of adaptive methylation, but adaptive methylation restored the ability of all of the mutant receptors to generate CW rotation. Second, when the aromatic anchor was replaced with tandem Ala residues, signaling was less compromised than when an Ala residue occupied position 209 and an aromatic residue occupied position 210. Finally, when Trp was: present at position 209, the identity of the residue at position 210 had little effect on baseline signal output or aspartate chemotaxis, although maltose taxis was significantly affected by some substitutions at position 210. All of the mutant receptors we constructed supported some level of aspartate and maltose taxis in semisolid agar swim plates, but those without Trp at position 209 were overmethylated in their baseline signaling state. These results show the importance of the cytoplasmic aromatic anchor of TM2 in maintaining the baseline Tar(Ec) signal output and responsiveness to attractant signaling.

  • 1187. Adase, Christopher A.
    et al.
    Draheim, Roger R.
    Stockholm University, Faculty of Science, Department of Biochemistry and Biophysics. Goethe University .
    Rueda, Garrett
    Desai, Raj
    Manson, Michael D.
    Residues at the Cytoplasmic End of Transmembrane Helix 2 Determine the Signal Output of the Tar(Ec) Chemoreceptor2013In: Biochemistry, ISSN 0006-2960, E-ISSN 1520-4995, Vol. 52, no 16, p. 2729-2738Article in journal (Refereed)
    Abstract [en]

    Baseline signal output and communication between the periplasmic and cytoplasmic domains of the Escherichia colt aspartate chemoreceptor Tar(Ec) are both strongly influenced by residues at the C-terminus of transmembrane helix 2 (TM2). In particular, the cytoplasmic aromatic anchor, composed of residues Trp-209 and Tyr-210 in wild type Tar(Ec) is important for determining the CheA kinase-stimulating activity of the receptor and its ability to respond to chemoeffector-induced stimuli. Here, we have studied the effect on Tar(Ec) function of the six residue sequence at positions 207-212 Moving various combinations of aromatic residues among these positions generates substantial changes M receptor activity. Trp has the largest effect on function, both in maintaining normal activity and in altering activity when it is moved. Tyr has a weaker effect, and Phe has the weakest; however, all three aromatic residues can alter signal output when they are placed in novel positions. We also find that Gly-211 plays an important role in receptor function, perhaps because of the flexibility it introduces into the TM2-HAMP domain connector. The conservation of this Gly residue in the high-abundance chemoreceptors of E. coli and Salmonella enterica suggests that it may be important for the nuanced, bidirectional transmembrane signaling that occurs in these proteins.

  • 1188.
    Adawi, Laila
    et al.
    Stockholm University, Faculty of Social Sciences, School of Business.
    Crevatin, Carolina
    Stockholm University, Faculty of Social Sciences, School of Business.
    IAS 39:s effekter på derivathantering: En studie av de börsnoterade bolagen på den nationella marknaden2005Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Med den ökade globaliseringen ökar också kravet på en mer enhetlig redovisningsnorm för företag världen över. Därför togs EU-beslutet att skapa en gemensam europeisk redovisningsstandard, vilken har fått namnet International Financial Reporting Standards, (IFRS). Det område som innebär den största förändringen gentemot ”God redovisningssed” är IAS 39 Financial Instruments; Recognition and Management. Därför har den setts som den svåraste punkten att implementera. Från och med den 31 december 2004 trädde IAS 39 ikraft och de som omfattas av regeln är främst de noterade bolagen. Frågan är om effekten av de nya redovisningsstandarderna kommer att påverka bolagens derivathantering? Om så är fallet; på vilka sätt?

  • 1189. Addario-Berry, Louigi
    et al.
    Broutin, Nicolas
    Holmgren, Cecilia
    Stockholm University, Faculty of Science, Department of Mathematics.
    CUTTING DOWN TREES WITH A MARKOV CHAINSAW2014In: The Annals of Applied Probability, ISSN 1050-5164, E-ISSN 2168-8737, Vol. 24, no 6, p. 2297-2339Article in journal (Refereed)
    Abstract [en]

    We provide simplified proofs for the asymptotic distribution of the number of cuts required to cut down a Galton-Watson tree with critical, finite-variance offspring distribution, conditioned to have total progeny n. Our proof is based on a coupling which yields a precise, nonasymptotic distributional result for the case of uniformly random rooted labeled trees (or, equivalently, Poisson Galton-Watson trees conditioned on their size). Our approach also provides a new, random reversible transformation between Brownian excursion and Brownian bridge.

  • 1190.
    Addensten, Emelie
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Special Education.
    Abbas, Amal
    Stockholm University, Faculty of Social Sciences, Department of Special Education.
    Självreflektion avseende inkludering i förskolan: Förskollärares upplevelser av ett självreflektionsverktyg2018Independent thesis Advanced level (professional degree), 10 credits / 15 HE creditsStudent thesis
  • 1191.
    Addo, Rebecka
    Stockholm University, Faculty of Social Sciences, Department of Psychology.
    Luktfunktion hos vuxna med diagnos inom Autismspektrumet2014Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Previous research has shown that individuals with a diagnosis within the autism spectrum

    (ASD) experience a greater sensory sensitivity, but few studies have investigated the olfaction

    sensitivity. The aim of the present study is to gain a deeper understanding of the olfactory

    functions in adults with ASD.16 participants with ASD (14 controls) participated in the study

    where sniffin sticks were used to evaluate the differences between the groups. All participants

    answered a questionnaire about perceived olfaction sensitivity and the adult spectrum quotient;

    AQ. Olfactory discrimination and identification (with and without cue) did not differ

    between the groups, as for olfaction sensitivity, perceived pleasantness, intensity and edibility.

    When it came to self-assessed olfactory sensitivity, differences were found. However, this

    self-rated sensitivity did not appear in the standardized odor tests, where no significant differences

    between ASD and controls odor features were detected.

  • 1192.
    Addo, Rebecka N.
    et al.
    Stockholm University, Faculty of Social Sciences, Department of Psychology, Perception and psychophysics. Uppsala University, Sweden.
    Wiens, Stefan
    Stockholm University, Faculty of Social Sciences, Department of Psychology, Perception and psychophysics.
    Nord, Marie
    Stockholm University, Faculty of Social Sciences, Department of Psychology, Perception and psychophysics.
    Larsson, Maria
    Stockholm University, Faculty of Social Sciences, Department of Psychology, Perception and psychophysics.
    Olfactory Functions in Adults With Autism Spectrum Disorders2017In: Perception, ISSN 0301-0066, E-ISSN 1468-4233, Vol. 46, no 3-4, p. 530-537Article in journal (Refereed)
    Abstract [en]

    Autism spectrum disorders (ASD) are often characterized by atypical sensory behavior (hyperor hyporeactivity) although evidence is scarce regarding olfactory abilities in ASD; 16 adults with high-functioning ASD (mean age: 38.2, SD: 9.7) and 14 healthy control subjects (mean age: 42.0 years, SD: 12.5) were assessed in odor threshold, free and cued odor identification, and perceived pleasantness, intensity, and edibility of everyday odors. Although results showed no differences between groups, the Bayes Factors (close to 1) suggested that the evidence for no group differences on the threshold and identification tests was inconclusive. In contrast, there was some evidence for no group differences on perceived edibility (BF01 = 2.69) and perceived intensity (BF01 = 2.80). These results do not provide conclusive evidence for or against differences between ASD and healthy controls on olfactory abilities. However, they suggest that there are no apparent group differences in subjective ratings of odors.

  • 1193. Ade, Florian
    et al.
    Freier, Ronny
    Odendahl, Christian
    Stockholm University, Faculty of Social Sciences, Department of Economics.
    Incumbency effects in government and opposition: Evidence from Germany2014In: European Journal of Political Economy, ISSN 0176-2680, E-ISSN 1873-5703, Vol. 36, p. 117-134Article in journal (Refereed)
    Abstract [en]

    Do district incumbents in an election have an advantage, and if so, do these advantages depend on which party is in government? We estimate the incumbency effect for the direct district candidates in German federal and state elections using a regression discontinuity design (RDD). When studying the heterogeneity in these effects, we find that incumbents from both large parties, the center-right CDU and the center-left SPD, have an advantage only if the SPD is in government. This effect is robust and shows even in state elections that are unrelated to federal elections.

  • 1194. Ade, P. A. R.
    et al.
    Aghanim, N.
    Alves, M. I. R.
    Arnaud, M.
    Ashdown, M.
    Aumont, J.
    Baccigalupi, C.
    Banday, A. J.
    Barreiro, R. B.
    Bartlett, J. G.
    Bartolo, N.
    Battaner, E.
    Benabed, K.
    Benoit, A.
    Benoit-Levy, A.
    Bernard, J. -P.
    Bersanelli, M.
    Bielewicz, P.
    Bock, J. J.
    Bonaldi, A.
    Bonavera, L.
    Bond, J. R.
    Borrill, J.
    Bouchet, F. R.
    Boulanger, F.
    Bucher, M.
    Burigana, C.
    Butler, R. C.
    Calabrese, E.
    Cardoso, J. -F.
    Catalano, A.
    Challinor, A.
    Chamballu, A.
    Chary, R. -R.
    Chiang, H. C.
    Christensen, P. R.
    Colombi, S.
    Colombo, L. P. L.
    Combet, C.
    Couchot, F.
    Coulais, A.
    Crill, B. P.
    Curto, A.
    Cuttaia, F.
    Danese, L.
    Davies, R. D.
    Davis, R. J.
    de Bernardis, P.
    de Rosa, A.
    de Zotti, G.
    Delabrouille, J.
    Delouis, J. -M.
    Desert, F. -X.
    Dickinson, C.
    Diego, J. M.
    Dole, H.
    Donzelli, S.
    Dore, O.
    Douspis, M.
    Ducout, A.
    Dupac, X.
    Efstathiou, G.
    Elsner, F.
    Ensslin, T. A.
    Eriksen, H. K.
    Falgarone, E.
    Fergusson, J.
    Finelli, F.
    Forni, O.
    Frailis, M.
    Fraisse, A. A.
    Franceschi, E.
    Frejsel, A.
    Galeotta, S.
    Galli, S.
    Ganga, K.
    Ghosh, T.
    Giard, M.
    Giraud-Heraud, Y.
    Gjerlow, E.
    Gonzalez-Nuevo, J.
    Gorski, K. M.
    Gratton, S.
    Gregorio, A.
    Gruppuso, A.
    Gudmundsson, Jón E.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Princeton University, USA.
    Hansen, F. K.
    Hanson, D.
    Harrison, D. L.
    Helou, G.
    Henrot-Versille, S.
    Hernandez-Monteagudo, C.
    Herranz, D.
    Hildebrandt, S. R.
    Hivon, E.
    Hobson, M.
    Holmes, W. A.
    Hornstrup, A.
    Hovest, W.
    Huffenberger, K. M.
    Hurier, G.
    Jaffe, A. H.
    Jaffe, T. R.
    Jones, W. C.
    Juvela, M.
    Keihanen, E.
    Keskitalo, R.
    Kisner, T. S.
    Kneissl, R.
    Knoche, J.
    Kunz, M.
    Kurki-Suonio, H.
    Lagache, G.
    Lahteenmaki, A.
    Lamarre, J. -M.
    Lasenby, A.
    Lattanzi, M.
    Lawrence, C. R.
    Leahy, J. P.
    Leonardi, R.
    Lesgourgues, J.
    Levrier, F.
    Liguori, M.
    Lilje, P. B.
    Linden-Vornle, M.
    Lopez-Caniego, M.
    Lubin, P. M.
    Macias-Perez, J. F.
    Maggio, G.
    Maino, D.
    Mandolesi, N.
    Mangilli, A.
    Maris, M.
    Marshall, D. J.
    Martin, P. G.
    Martinez-Gonzalez, E.
    Masi, S.
    Matarrese, S.
    McGehee, P.
    Meinhold, P. R.
    Melchiorri, A.
    Mendes, L.
    Mennella, A.
    Migliaccio, M.
    Mitra, S.
    Miville-Deschenes, M. -A.
    Moneti, A.
    Montier, L.
    Morgante, G.
    Mortlock, D.
    Moss, A.
    Munshi, D.
    Murphy, J. A.
    Nati, F.
    Natoli, P.
    Netterfield, C. B.
    Norgaard-Nielsen, H. U.
    Noviello, F.
    Novikov, D.
    Novikov, I.
    Orlando, E.
    Oxborrow, C. A.
    Paci, F.
    Pagano, L.
    Pajot, F.
    Paladini, R.
    Paoletti, D.
    Partridge, B.
    Pasian, F.
    Patanchon, G.
    Pearson, T. J.
    Peel, M.
    Perdereau, O.
    Perotto, L.
    Perrotta, F.
    Pettorino, V.
    Piacentini, F.
    Piat, M.
    Pierpaoli, E.
    Pietrobon, D.
    Plaszczynski, S.
    Pointecouteau, E.
    Polenta, G.
    Pratt, G. W.
    Prezeau, G.
    Prunet, S.
    Puget, J. -L.
    Rachen, J. P.
    Reach, W. T.
    Rebolo, R.
    Reinecke, M.
    Remazeilles, M.
    Renault, C.
    Renzi, A.
    Ristorcelli, I.
    Rocha, G.
    Rosset, C.
    Rossetti, M.
    Roudier, G.
    Rubino-Martin, J. A.
    Rusholme, B.
    Sandri, M.
    Santos, D.
    Savelainen, M.
    Savini, G.
    Scott, D.
    Seiffert, M. D.
    Shellard, E. P. S.
    Spencer, L. D.
    Stolyarov, V.
    Stompor, R.
    Strong, A. W.
    Sudiwala, R.
    Sunyaev, R.
    Sutton, D.
    Suur-Uski, A. -S.
    Sygnet, J. -F.
    Tauber, J. A.
    Terenzi, L.
    Toffolatti, L.
    Tomasi, M.
    Tristram, M.
    Tucci, M.
    Tuovinen, J.
    Umana, G.
    Valenziano, L.
    Valiviita, J.
    Van Tent, F.
    Vidal, M.
    Vielva, P.
    Villa, F.
    Wade, L. A.
    Wandelt, B. D.
    Watson, R.
    Wehus, I. K.
    Wilkinson, A.
    Yvon, D.
    Zacchei, A.
    Zonca, A.
    Planck 2015 results XXV. Diffuse low-frequency Galactic foregrounds2016In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 594, article id A25Article in journal (Refereed)
    Abstract [en]

    We discuss the Galactic foreground emission between 20 and 100 GHz based on observations by Planck and WMAP. The total intensity in this part of the spectrum is dominated by free-free and spinning dust emission, whereas the polarized intensity is dominated by synchrotron emission. The Commander component-separation tool has been used to separate the various astrophysical processes in total intensity. Comparison with radio recombination line templates verifies the recovery of the free-free emission along the Galactic plane. Comparison of the high-latitude H alpha emission with our free-free map shows residuals that correlate with dust optical depth, consistent with a fraction (approximate to 30%) of H alpha having been scattered by high-latitude dust. We highlight a number of diffuse spinning dust morphological features at high latitude. There is substantial spatial variation in the spinning dust spectrum, with the emission peak (in I-v) ranging from below 20 GHz to more than 50 GHz. There is a strong tendency for the spinning dust component near many prominent H Pi regions to have a higher peak frequency, suggesting that this increase in peak frequency is associated with dust in the photo-dissociation regions around the nebulae. The emissivity of spinning dust in these diffuse regions is of the same order as previous detections in the literature. Over the entire sky, the Commander solution finds more anomalous microwave emission (AME) than the WMAP component maps, at the expense of synchrotron and free-free emission. This can be explained by the difficulty in separating multiple broadband components with a limited number of frequency maps. Future surveys, particularly at 5-20 GHz, will greatly improve the separation by constraining the synchrotron spectrum. We combine Planck and WMAP data to make the highest signal-to-noise ratio maps yet of the intensity of the all-sky polarized synchrotron emission at frequencies above a few GHz. Most of the high-latitude polarized emission is associated with distinct large-scale loops and spurs, and we re-discuss their structure. We argue that nearly all the emission at 40 degrees > l > -90 degrees is part of the Loop I structure, and show that the emission extends much further in to the southern Galactic hemisphere than previously recognised, giving Loop I an ovoid rather than circular outline. However, it does not continue as far as the Fermi bubble/microwave haze, making it less probable that these are part of the same structure. We identify a number of new faint features in the polarized sky, including a dearth of polarized synchrotron emission directly correlated with a narrow, roughly 20 degrees long filament seen in H alpha at high Galactic latitude. Finally, we look for evidence of polarized AME, however many AME regions are significantly contaminated by polarized synchrotron emission, and we find a 2 sigma upper limit of 1.6% in the Perseus region.

  • 1195. Ade, P. A. R.
    et al.
    Aghanim, N.
    Argueeso, F.
    Arnaud, M.
    Ashdown, M.
    Aumont, J.
    Baccigalupi, C.
    Banday, A. J.
    Barreiro, R. B.
    Bartolo, N.
    Battaner, E.
    Beichman, C.
    Benabed, K.
    Benoit, A.
    Benoit-Levy, A.
    Bernard, J. -P.
    Bersanelli, M.
    Bielewicz, P.
    Bock, J. J.
    Boehringer, H.
    Bonaldi, A.
    Bonavera, L.
    Bond, J. R.
    Borrill, J.
    Bouchet, F. R.
    Boulanger, F.
    Bucher, M.
    Burigana, C.
    Butler, R. C.
    Calabrese, E.
    Cardoso, J. -F.
    Carvalho, P.
    Catalano, A.
    Challinor, A.
    Chamballu, A.
    Chary, R. -R.
    Chiang, H. C.
    Christensen, P. R.
    Clemens, M.
    Clements, D. L.
    Colombi, S.
    Colombo, L. P. L.
    Combet, C.
    Couchot, F.
    Coulais, A.
    Crill, B. P.
    Curto, A.
    Cuttaia, F.
    Danese, L.
    Davies, R. D.
    Davis, R. J.
    de Bernardis, P.
    de Rosa, A.
    de Zotti, G.
    Delabrouille, J.
    Desert, F. -X.
    Dickinson, C.
    Diego, J. M.
    Dole, H.
    Donzelli, S.
    Dore, O.
    Douspis, M.
    Ducout, A.
    Dupac, X.
    Efstathiou, G.
    Elsner, F.
    Ensslin, T. A.
    Eriksen, H. K.
    Falgarone, E.
    Fergusson, J.
    Finelli, F.
    Forni, O.
    Frailis, M.
    Fraisse, A. A.
    Franceschi, E.
    Frejsel, A.
    Galeotta, S.
    Galli, S.
    Ganga, K.
    Giard, M.
    Giraud-Heraud, Y.
    Gjerlow, E.
    Gonzalez-Nuevo, J.
    Gorski, K. M.
    Gratton, S.
    Gregorio, A.
    Gruppuso, A.
    Gudmundsson, Jón E.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Princeton University, USA.
    Hansen, F. K.
    Hanson, D.
    Harrison, D. L.
    Helou, G.
    Henrot-Versille, S.
    Hernandez-Monteagudo, C.
    Herranz, D.
    Hildebrandt, S. R.
    Hivon, E.
    Hobson, M.
    Holmes, W. A.
    Hornstrup, A.
    Hovest, W.
    Huffenberger, K. M.
    Hurier, G.
    Jaffe, A. H.
    Jaffe, T. R.
    Jones, W. C.
    Juvela, M.
    Keihanen, E.
    Keskitalo, R.
    Kisner, T. S.
    Kneissl, R.
    Knoche, J.
    Kunz, M.
    Kurki-Suonio, H.
    Lagache, G.
    Lahteenmaki, A.
    Lamarre, J. -M.
    Lasenby, A.
    Lattanzi, M.
    Lawrence, C. R.
    Leahy, J. P.
    Leonardi, R.
    Leon-Tavares, J.
    Lesgourgues, J.
    Levrier, F.
    Liguori, M.
    Lilje, P. B.
    Linden-Vornle, M.
    Lopez-Caniego, M.
    Lubin, P. M.
    Macias-Perez, J. F.
    Maggio, G.
    Maino, D.
    Mandolesi, N.
    Mangilli, A.
    Maris, M.
    Marshall, D. J.
    Martin, P. G.
    Martinez-Gonzalez, E.
    Masi, S.
    Matarrese, S.
    McGehee, P.
    Meinhold, P. R.
    Melchiorri, A.
    Mendes, L.
    Mennella, A.
    Migliaccio, M.
    Mitra, S.
    Miville-Deschenes, M. -A.
    Moneti, A.
    Montier, L.
    Morgante, G.
    Mortlock, D.
    Moss, A.
    Munshi, D.
    Murphy, J. A.
    Naselsky, P.
    Nati, F.
    Natoli, P.
    Negrello, M.
    Netterfield, C. B.
    Norgaard-Nielsen, H. U.
    Noviello, F.
    Novikov, D.
    Novikov, I.
    Oxborrow, C. A.
    Paci, F.
    Pagano, L.
    Pajot, F.
    Paladini, R.
    Paoletti, D.
    Partridge, B.
    Pasian, F.
    Patanchon, G.
    Pearson, T. J.
    Perdereau, O.
    Perotto, L.
    Perrotta, F.
    Pettorino, V.
    Piacentini, F.
    Piat, M.
    Pierpaoli, E.
    Pietrobon, D.
    Plaszczynski, S.
    Pointecouteau, E.
    Polenta, G.
    Pratt, G. W.
    Prezeau, G.
    Prunet, S.
    Puget, J. -L.
    Rachen, J. P.
    Reach, W. T.
    Rebolo, R.
    Reinecke, M.
    Remazeilles, M.
    Renault, C.
    Renzi, A.
    Ristorcelli, I.
    Rocha, G.
    Rosset, C.
    Rossetti, M.
    Roudier, G.
    Rowan-Robinson, M.
    Rubino-Martin, J. A.
    Rusholme, B.
    Sandri, M.
    Sanghera, H. S.
    Santos, D.
    Savelainen, M.
    Savini, G.
    Scott, D.
    Seiffert, M. D.
    Shellard, E. P. S.
    Spencer, L. D.
    Stolyarov, V.
    Sudiwala, R.
    Sunyaev, R.
    Sutton, D.
    Suur-Uski, A. -S.
    Sygnet, J. -F.
    Tauber, J. A.
    Terenzi, L.
    Toffolatti, L.
    Tomasi, M.
    Tornikoski, M.
    Tristram, M.
    Tucci, M.
    Tuovinen, J.
    Turler, M.
    Umana, G.
    Valenziano, L.
    Valiviita, J.
    Van Tent, B.
    Vielva, P.
    Villa, F.
    Wade, L. A.
    Walter, B.
    Wandelt, B. D.
    Wehus, I. K.
    Yvon, D.
    Zacchei, A.
    Zonca, A.
    Planck 2015 results XXVI. The Second Planck Catalogue of Compact Sources2016In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 594, article id A26Article in journal (Refereed)
    Abstract [en]

    The Second Planck Catalogue of Compact Sources is a list of discrete objects detected in single-frequency maps from the full duration of the Planck mission and supersedes previous versions. It consists of compact sources, both Galactic and extragalactic, detected over the entire sky. Compact sources detected in the lower frequency channels are assigned to the PCCS2, while at higher frequencies they are assigned to one of two subcatalogues, the PCCS2 or PCCS2E, depending on their location on the sky. The first of these (PCCS2) covers most of the sky and allows the user to produce subsamples at higher reliabilities than the target 80% integral reliability of the catalogue. The second ( PCCS2E) contains sources detected in sky regions where the diffuse emission makes it difficult to quantify the reliability of the detections. Both the PCCS2 and PCCS2E include polarization measurements, in the form of polarized flux densities, or upper limits, and orientation angles for all seven polarization-sensitive Planck channels. The improved data-processing of the full-mission maps and their reduced noise levels allow us to increase the number of objects in the catalogue, improving its completeness for the target 80% reliability as compared with the previous versions, the PCCS and the Early Release Compact Source Catalogue (ERCSC).

  • 1196. Ade, P. A. R.
    et al.
    Aghanim, N.
    Arnaud, M.
    Arroja, F.
    Ashdown, M.
    Aumont, J.
    Baccigalupi, C.
    Ballardini, M.
    Banday, A. J.
    Barreiro, R. B.
    Bartolo, N.
    Battaner, E.
    Benabed, K.
    Benoit, A.
    Benoit-Levy, A.
    Bernard, J. -P.
    Bersanelli, M.
    Bielewicz, P.
    Bock, J. J.
    Bonaldi, A.
    Bonavera, L.
    Bond, J. R.
    Borrill, J.
    Bouchet, F. R.
    Bucher, M.
    Burigana, C.
    Butler, R. C.
    Calabrese, E.
    Cardoso, J. -F.
    Catalano, A.
    Chamballu, A.
    Chiang, H. C.
    Chluba, J.
    Christensen, P. R.
    Church, S.
    Clements, D. L.
    Colombi, S.
    Colombo, L. P. L.
    Combet, C.
    Couchot, F.
    Coulais, A.
    Crill, B. P.
    Curto, A.
    Cuttaia, F.
    Danese, L.
    Davies, R. D.
    Davis, R. J.
    de Bernardis, P.
    de Rosa, A.
    de Zotti, G.
    Delabrouille, J.
    Desert, F. -X.
    Diego, J. M.
    Dolag, K.
    Dole, H.
    Donzelli, S.
    Dore, A.
    Douspis, M.
    Ducout, A.
    Dupac, X.
    Efstathiou, G.
    Elsner, F.
    Ensslin, T. A.
    Eriksen, H. K.
    Fergusson, J.
    Finelli, F.
    Florido, E.
    Forni, O.
    Frailis, M.
    Fraisse, A. A.
    Franceschi, E.
    Frejsel, A.
    Galeotta, S.
    Galli, S.
    Ganga, K.
    Giard, M.
    Giraud-Heraud, Y.
    Gjerlow, E.
    Gonzalez-Nuevo, J.
    Gorski, K. M.
    Gratton, S.
    Gregorio, A.
    Gruppuso, A.
    Gudmundsson, Jón E.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Princeton University, USA.
    Hansen, F. K.
    Hanson, D.
    Harrison, D. L.
    Helou, G.
    Henrot-Versille, S.
    Hernandez-Monteagudo, C.
    Herranz, D.
    Hildebrandt, S. R.
    Hivon, E.
    Hobson, M.
    Holmes, W. A.
    Hornstrup, A.
    Hovest, W.
    Huffenberger, K. M.
    Hurier, G.
    Jaffe, A. H.
    Jaffe, T. R.
    Jones, W. C.
    Juvela, M.
    Keihanen, E.
    Keskitalo, R.
    Kim, J.
    Kisner, T. S.
    Knoche, J.
    Kunz, M.
    Kurki-Suonio, H.
    Lagache, G.
    Lahteenmaki, A.
    Lamarre, J. -M.
    Lasenby, A.
    Lattanzi, M.
    Lawrence, C. R.
    Leahy, J. P.
    Leonardi, R.
    Lesgourgues, J.
    Levrier, F.
    Liguori, M.
    Lilje, P. B.
    Linden-Vornle, M.
    Lopez-Caniego, M.
    Lubin, P. M.
    Macias-Perez, J. F.
    Maggio, G.
    Maino, D.
    Mandolesi, N.
    Mangilli, A.
    Maris, M.
    Martin, P. G.
    Martinez-Gonzalez, E.
    Masi, S.
    Matarrese, S.
    McGehee, P.
    Meinhold, P. R.
    Melchiorri, A.
    Mendes, L.
    Mennella, A.
    Migliaccio, M.
    Mitra, S.
    Miville-Deschenes, M. -A.
    Molinari, D.
    Moneti, A.
    Montier, L.
    Morgante, G.
    Mortlock, D.
    Moss, A.
    Munshi, D.
    Murphy, J. A.
    Naselsky, P.
    Nati, F.
    Natoli, P.
    Netterfield, C. B.
    Norgaard-Nielsen, H. U.
    Noviello, F.
    Novikov, D.
    Novikov, I.
    Oppermann, N.
    Oxborrow, C. A.
    Paci, F.
    Pagano, L.
    Pajot, F.
    Paoletti, D.
    Pasian, F.
    Patanchon, G.
    Perdereau, O.
    Perotto, L.
    Perrotta, F.
    Pettorino, V.
    Piacentini, F.
    Piat, M.
    Pierpaoli, E.
    Pietrobon, D.
    Plaszczynski, S.
    Pointecouteau, E.
    Polenta, G.
    Popa, L.
    Pratt, G. W.
    Prezeau, G.
    Prunet, S.
    Puget, J. -L.
    Rachen, J. P.
    Rebolo, R.
    Reinecke, M.
    Remazeilles, M.
    Renault, C.
    Renzi, A.
    Ristorcelli, I.
    Rocha, G.
    Rosset, C.
    Rossetti, M.
    Roudier, G.
    Rubino-Martin, J. A.
    Ruiz-Granados, B.
    Rusholme, B.
    Sandri, M.
    Santos, D.
    Savelainen, M.
    Savini, G.
    Scott, D.
    Seiffert, M. D.
    Shellard, E. P. S.
    Shiraishi, M.
    Spencer, L. D.
    Stolyarov, V.
    Stompor, R.
    Sudiwala, R.
    Sunyaev, R.
    Sutton, D.
    Suur-Uski, A. -S.
    Sygnet, J. -F.
    Tauber, J. A.
    Terenzi, L.
    Toffolatti, L.
    Tomasi, M.
    Tristram, M.
    Tucci, M.
    Tuovinen, J.
    Umana, G.
    Valenziano, L.
    Valiviita, J.
    Van Tent, B.
    Vielva, P.
    Villa, F.
    Wade, L. A.
    Wandelt, B. D.
    Wehus, I. K.
    Yvon, D.
    Zacchei, A.
    Zonca, A.
    Planck 2015 results XIX. Constraints on primordial magnetic fields2016In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 594, article id A19Article in journal (Refereed)
    Abstract [en]

    We compute and investigate four types of imprint of a stochastic background of primordial magnetic fields (PMFs) on the cosmic microwave background (CMB) anisotropies: the impact of PMFs on the CMB temperature and polarization spectra, which is related to their contribution to cosmological perturbations; the effect on CMB polarization induced by Faraday rotation; the impact of PMFs on the ionization history; magnetically-induced non-Gaussianities and related non-zero bispectra; and the magnetically-induced breaking of statistical isotropy. We present constraints on the amplitude of PMFs that are derived from different Planck data products, depending on the specific effect that is being analysed. Overall, Planck data constrain the amplitude of PMFs to less than a few nanoGauss, with different bounds that depend on the considered model. In particular, individual limits coming from the analysis of the CMB angular power spectra, using the Planck likelihood, are B-1 (Mpc) < 4.4 nG (where B1 Mpc is the comoving field amplitude at a scale of 1 Mpc) at 95% confidence level, assuming zero helicity. By considering the Planck likelihood, based only on parity-even angular power spectra, we obtain B-1 (Mpc) < 5.6 nG for a maximally helical field. For nearly scale-invariant PMFs we obtain B-1 (Mpc) < 2.0 nG and B-1 (Mpc) < 0.9 nG if the impact of PMFs on the ionization history of the Universe is included in the analysis. From the analysis of magnetically-induced non-Gaussianity, we obtain three different values, corresponding to three applied methods, all below 5 nG. The constraint from the magnetically-induced passive-tensor bispectrum is B-1 (Mpc) < 2.8 nG. A search for preferred directions in the magnetically-induced passive bispectrum yields B-1 (Mpc) < 4.5 nG, whereas the compensated-scalar bispectrum gives B-1 (Mpc) < 3 nG. The analysis of the Faraday rotation of CMB polarization by PMFs uses the Planck power spectra in EE and BB at 70 GHz and gives B-1 (Mpc) < 1380 nG. In our final analysis, we consider the harmonic-space correlations produced by Alfven waves, finding no significant evidence for the presence of these waves. Together, these results comprise a comprehensive set of constraints on possible PMFs with Planck data.

  • 1197. Ade, P. A. R.
    et al.
    Aghanim, N.
    Arnaud, M.
    Arroja, F.
    Ashdown, M.
    Aumont, J.
    Baccigalupi, C.
    Ballardini, M.
    Banday, A. J.
    Barreiro, R. B.
    Bartolo, N.
    Battaner, E.
    Benabed, K.
    Benoit, A.
    Benoit-Levy, A.
    Bernard, J. -P.
    Bersanelli, M.
    Bielewicz, P.
    Bock, J. J.
    Bonaldi, A.
    Bonavera, L.
    Bondi, J. R.
    Borrillu, J.
    Bouchet, F. R.
    Boulanger, F.
    Bucher, M.
    Burigana, C.
    Butler, R. C.
    Calabrese, E.
    Cardoso, J. -F.
    Catalano, A.
    Challinor, A.
    Chamballu, A.
    Chary, R. -R.
    Chiang, H. C.
    Christensen, P. R.
    Churchl, S.
    Clements, D. L.
    Colombi, S.
    Colombo, L. P. L.
    Combet, C.
    Contreras, D.
    Couchot, F.
    Coulais, A.
    Crill, B. P.
    Curto, A.
    Cuttaia, F.
    Danese, L.
    Davies, R. D.
    Davis, R. J.
    de Bernardis, P.
    de Rosa, A.
    de Zotti, G.
    Delabrouillei, J.
    Desert, F. -X.
    Diego, J. M.
    Dole, H.
    Donzelli, S.
    Dore, O.
    Douspis, M.
    Ducout, A.
    Dupac, X.
    Efstathiou, G.
    Elsner, F.
    Ensslin, T. A.
    Eriksen, H. K.
    Fergusson, J.
    Finelli, F.
    Forni, O.
    Frailis, M.
    Fraisse, A. A.
    Franceschi, E.
    Frejsel, A.
    Frolov, A.
    Galeotta, S.
    Galli, S.
    Ganga, K.
    Gauthier, C.
    Giard, M.
    Giraud-Heraud, Y.
    Gjerlow, E.
    Gonzalez-Nuevo, J.
    Gorski, K. M.
    Gratton, S.
    Gregorio, A.
    Gruppuso, A.
    Gudmundsson, Jón E.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Princeton University, USA.
    Hamann, J.
    Handley, W.
    Hansen, F. K.
    Hanson, D.
    Harrison, D. L.
    Henrot-Versille, S.
    Hernandez-Monteagudo, C.
    Herranz, D.
    Hildebrandt, S. R.
    Hivon, E.
    Hobson, M.
    Holmes, W. A.
    Hornstrup, A.
    Hovest, W.
    Huang, Z.
    Huffenberger, K. M.
    Hurier, G.
    Jaffe, A. H.
    Jaffe, T. R.
    Jones, W. C.
    Juvela, M.
    Keihanen, E.
    Keskitalo, R.
    Kim, J.
    Kisner, T. S.
    Kneissl, R.
    Knoche, J.
    Kunz, M.
    Kurki-Suonio, H.
    Lagache, G.
    Lahteenmaki, A.
    Lamarre, J. -M.
    Lasenby, A.
    Lattanzi, M.
    Lawrence, C. R.
    Leonardi, R.
    Lesgourgues, J.
    Levrier, F.
    Lewis, A.
    Liguori, M.
    Lilje, P. B.
    Linden-Vornle, M.
    Lopez-Caniego, M.
    Lubin, P. M.
    Ma, Y. -Z.
    Macias-Perez, J. F.
    Maggio, G.
    Maino, D.
    Mandolesi, N.
    Mangilli, A.
    Maris, M.
    Martini, P. G.
    Martinez-Gonzalez, E.
    Masi, S.
    Matarrese, S.
    McGehee, P.
    Meinhold, P. R.
    Melchiorri, A.
    Mendes, L.
    Mennella, A.
    Migliaccio, M.
    Mitra, S.
    Miville-Deschenes, M. -A.
    Molinari, D.
    Moneti, A.
    Montier, L.
    Morgante, G.
    Mortlock, D.
    Moss, A.
    Munchmeyer, M.
    Munshi, D.
    Murphy, J. A.
    Naselsky, P.
    Nati, F.
    Natoli, P.
    Netterfield, C. B.
    Norgaard-Nielsen, H. U.
    Noviello, F.
    Novikov, D.
    Novikov, I.
    Oxborrow, C. A.
    Paci, F.
    Pagano, L.
    Pajot, F.
    Paladini, R.
    Pandolfi, S.
    Paoletti, D.
    Pasian, F.
    Patanchon, G.
    Pearson, T. J.
    Peiris, H. V.
    Perdereau, O.
    Perotto, L.
    Perrotta, F.
    Pettorino, V.
    Piacentini, F.
    Piat, M.
    Pierpaoli, E.
    Pietrobon, D.
    Plaszczynski, S.
    Pointecouteau, E.
    Polenta, G.
    Popa, L.
    Pratt, G. W.
    Prezeau, G.
    Prunet, S.
    Puget, J. -L.
    Rachen, J. P.
    Reach, W. T.
    Rebolo, R.
    Reinecke, M.
    Remazeilles, M.
    Renault, C.
    Renzi, A.
    Ristorcelli, I.
    Rocha, G.
    Rosset, C.
    Rossetti, M.
    Roudier, G.
    Rowan-Robinson, M.
    Rubino-Martin, J. A.
    Rusholme, B.
    Sandri, M.
    Santos, D.
    Savelainen, M.
    Savini, G.
    Scott, D.
    Seiffert, M. D.
    Shellard, E. P. S.
    Shiraishi, M.
    Spencer, L. D.
    Stolyarov, V.
    Stompori, R.
    Sudiwala, R.
    Sunyaev, R.
    Sutton, D.
    Suur-Uski, A. -S.
    Sygnet, J. -F.
    Tauber, J. A.
    Terenzi, L.
    Toffolatti, L.
    Tomasi, M.
    Tristram, M.
    Trombetti, T.
    Tucci, M.
    Tuovinen, J.
    Valenziano, L.
    Valiviita, J.
    Van Tent, B.
    Vielva, P.
    Villa, F.
    Wade, L. A.
    Wandelt, B. D.
    Wehus, I. K.
    White, M.
    Yvon, D.
    Zacchei, A.
    Zibin, J. P.
    Zonca, A.
    Planck 2015 results XX. Constraints on inflation2016In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 594, article id A20Article in journal (Refereed)
    Abstract [en]

    We present the implications for cosmic inflation of the Planck measurements of the cosmic microwave background (CMB) anisotropies in both temperature and polarization based on the full Planck survey, which includes more than twice the integration time of the nominal survey used for the 2013 release papers. The Planck full mission temperature data and a first release of polarization data on large angular scales measure the spectral index of curvature perturbations to be n(s) = 0.968 +/- 0.006 and tightly constrain its scale dependence to dn(s)/dln k = -0.003 +/- 0.007 when combined with the Planck lensing likelihood. When the Planck high-l polarization data are included, the results are consistent and uncertainties are further reduced. The upper bound on the tensor-to-scalar ratio is r(0).(002) < 0.11 (95% CL). This upper limit is consistent with the B-mode polarization constraint r < 0.12 (95% CL) obtained from a joint analysis of the BICEP2/Keck Array and Planck data. These results imply that V(phi) proportional to phi(2) and natural inflation are now disfavoured compared to models predicting a smaller tensor-to-scalar ratio, such as R-2 inflation. We search for several physically motivated deviations from a simple power-law spectrum of curvature perturbations, including those motivated by a reconstruction of the inflaton potential not relying on the slow-roll approximation. We find that such models are not preferred, either according to a Bayesian model comparison or according to a frequentist simulation-based analysis. Three independent methods reconstructing the primordial power spectrum consistently recover a featureless and smooth P-R (k) over the range of scales 0.008 Mpc(-1) less than or similar to k less than or similar to 0.1 Mpc(-1). At large scales, each method finds deviations from a power law, connected to a deficit at multipoles l approximate to 20-40 in the temperature power spectrum, but at an uncompelling statistical significance owing to the large cosmic variance present at these multipoles. By combining power spectrum and non-Gaussianity bounds, we constrain models with generalized Lagrangians, including Galileon models and axion monodromy models. The Planck data are consistent with adiabatic primordial perturbations, and the estimated values for the parameters of the base Lambda cold dark matter (Lambda CDM) model are not significantly altered when more general initial conditions are admitted. In correlated mixed adiabatic and isocurvature models, the 95% CL upper bound for the non-adiabatic contribution to the observed CMB temperature variance is vertical bar alpha(non-adi)vertical bar < 1.9%, 4.0%, and 2.9% for CDM, neutrino density, and neutrino velocity isocurvature modes, respectively. We have tested inflationary models producing an anisotropic modulation of the primordial curvature power spectrum finding that the dipolar modulation in the CMB temperature field induced by a CDM isocurvature perturbation is not preferred at a statistically significant level. We also establish tight constraints on a possible quadrupolar modulation of the curvature perturbation. These results are consistent with the Planck 2013 analysis based on the nominal mission data and further constrain slow-roll single-field inflationary models, as expected from the increased precision of Planck data using the full set of observations.

  • 1198. Ade, P. A. R.
    et al.
    Aghanim, N.
    Arnaud, M.
    Arrojam, F.
    Ashdown, M.
    Aumont, J.
    Baccigalupi, C.
    Ballardini, M.
    Banday, A. J.
    Barreiro, R. B.
    Bartolo, N.
    Basak, S.
    Battaner, E.
    Benabed, K.
    Benoit, A.
    Benoit-Levy, A.
    Bernard, J. -P.
    Bersanelli, M.
    Bielewicz, P.
    Bock, J. J.
    Bonaldi, A.
    Bonavera, L.
    Bond, J. R.
    Borrill, J.
    Bouchet, F. R.
    Boulanger, F.
    Bucher, M.
    Burigana, C.
    Butler, R. C.
    Calabrese, E.
    Cardoso, J. -F.
    Catalano, A.
    Challinor, A.
    Chamballu, A.
    Chiang, H. C.
    Christensen, P. R.
    Church, S.
    Clements, D. L.
    Colombi, S.
    Colombo, L. P. L.
    Combet, C.
    Couchot, F.
    Coulais, A.
    Crill, B. P.
    Curto, A.
    Cuttaia, F.
    Danese, L.
    Davies, R. D.
    Davis, R. J.
    de Bernardis, P.
    de Rosa, A.
    de Zotti, G.
    Delabrouille, J.
    Desert, F. -X.
    Diego, J. M.
    Dole, H.
    Donzelli, S.
    Dore, O.
    Douspis, M.
    Ducout, A.
    Dupac, X.
    Efstathiou, G.
    Elsner, F.
    Ensslin, T. A.
    Eriksen, H. K.
    Fergusson, J.
    Finelli, F.
    Forni, O.
    Frailis, M.
    Fraisse, A. A.
    Franceschi, E.
    Frejsel, A.
    Galeotta, S.
    Galli, S.
    Ganga, K.
    Gauthier, C.
    Ghosh, T.
    Giard, M.
    Giraud-Heraud, Y.
    Gjerlow, E.
    Gonzalez-Nuevo, J.
    Gorski, K. M.
    Gratton, S.
    Gregorio, A.
    Gruppuso, A.
    Gudmundsson, Jón E.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Princeton University, USA.
    Hamann, J.
    Hansen, F. K.
    Hanson, D.
    Harrison, D. L.
    Heavens, A.
    Helou, G.
    Henrot-Versille, S.
    Hernandez-Monteagudo, C.
    Herranz, D.
    Hildebrandt, S. R.
    Hivon, E.
    Hobson, M.
    Holmes, W. A.
    Hornstrup, A.
    Hovest, W.
    Huang, Z.
    Huffenberger, K. M.
    Hurier, G.
    Jaffe, A. H.
    Jaffe, T. R.
    Jones, W. C.
    Juvela, M.
    Keihanen, E.
    Keskitalo, R.
    Kim, J.
    Kisner, T. S.
    Knoche, J.
    Kunz, M.
    Kurki-Suonio, H.
    Lacasa, F.
    Lagache, G.
    Lahteenmaki, A.
    Lamarre, J. -M.
    Lasenby, A.
    Lattanzi, M.
    Lawrence, C. R.
    Leonardi, R.
    Lesgourgues, J.
    Levrier, F.
    Lewis, A.
    Liguori, M.
    Lilje, P. B.
    Linden-Vornle, M.
    Lopez-Caniego, M.
    Lubin, P. M.
    Macias-Perez, J. F.
    Maggio, G.
    Maino, D.
    Mandolesi, N.
    Mangilli, A.
    Marinucci, D.
    Maris, M.
    Martin, P. G.
    Martinez-Gonzalez, E.
    Masi, S.
    Matarrese, S.
    McGehee, P.
    Meinhold, P. R.
    Melchiorri, A.
    Mendes, L.
    Mennella, A.
    Migliaccio, M.
    Mitra, S.
    Miville-Deschenes, M. -A.
    Moneti, A.
    Montier, L.
    Morgante, G.
    Mortlock, D.
    Moss, A.
    Munchmeyer, M.
    Munshi, D.
    Murphy, J. A.
    Naselsky, P.
    Nati, F.
    Natoli, P.
    Netterfield, C. B.
    Norgaard-Nielsen, H. U.
    Noviello, F.
    Novikov, D.
    Novikov, I.
    Oxborrow, C. A.
    Paci, F.
    Pagano, L.
    Pajot, F.
    Paoletti, D.
    Pasian, F.
    Patanchon, G.
    Peiris, H. V.
    Perdereau, O.
    Perotto, L.
    Perrotta, F.
    Pettorino, V.
    Piacentini, F.
    Piat, M.
    Pierpaoli, E.
    Pietrobon, D.
    Plaszczynski, S.
    Pointecouteau, E.
    Polenta, G.
    Popa, L.
    Pratt, G. W.
    Prezeau, G.
    Prunet, S.
    Puget, J. -L.
    Rachen, J. P.
    Racine, B.
    Rebolo, R.
    Reinecke, M.
    Remazeilles, M.
    Renault, C.
    Renzi, A.
    Ristorcelli, I.
    Rocha, G.
    Rosset, C.
    Rossetti, M.
    Roudier, G.
    Rubino-Martin, J. A.
    Rusholme, B.
    Sandri, M.
    Santos, D.
    Savelainen, M.
    Savini, G.
    Scott, D.
    Seiffert, M. D.
    Shellard, E. P. S.
    Shiraishi, M.
    Smith, K.
    Spencer, L. D.
    Stolyarov, V.
    Stompor, R.
    Sudiwala, R.
    Sunyaev, R.
    Sutter, P.
    Sutton, D.
    Suur-Uski, A. -S.
    Sygnet, J. -F.
    Tauber, J. A.
    Terenzi, L.
    Toffolatti, L.
    Tomasi, M.
    Tristram, M.
    Troja, A.
    Tucci, M.
    Tuovinen, J.
    Valenziano, L.
    Valiyiita, J.
    Van Tent, B.
    Vielva, P.
    Villas, F.
    Wade, L. A.
    Wandelt, B. D.
    Wehus, I. K.
    Yvon, D.
    Zacchei, A.
    Zonca, A.
    Planck 2015 results XVII. Constraints on primordial non-Gaussianity2016In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 594, article id A17Article in journal (Refereed)
    Abstract [en]

    The Planck full mission cosmic microwave background (CMB) temperature and E-mode polarization maps are analysed to obtain constraints on primordial non-Gaussianity (NG). Using three classes of optimal bispectrum estimators - separable template-fitting (KSW), binned, and modal we obtain consistent values for the primordial local, equilateral, and orthogonal bispectrum amplitudes, quoting as our final result from temperature alone f(NL)(local) = 2.5 +/- 5.7, f(NL)(equil) = 16 +/- 70, and f(NL)(ortho) = 34 +/- 33 (68% CL, statistical). Combining temperature and polarization data we obtain f(NL)(local) = 0.8 +/- 5.0, f(NL)(equil) = 4 +/- 43, and f(NL)(ortho) = 26 +/- 21 (68% CL, statistical). The results are based on comprehensive cross-validation of these estimators on Gaussian and non-Gaussian simulations, are stable across component separation techniques, pass an extensive suite of tests, and are consistent with estimators based on measuring the Minkowski functionals of the CMB. The effect of time-domain de-glitching systematics on the bispectrum is negligible. In spite of these test outcomes we conservatively label the results including polarization data as preliminary, owing to a known mismatch of the noise model in simulations and the data. Beyond estimates of individual shape amplitudes, we present model-independent, three-dimensional reconstructions of the Planck CMB bispectrum and derive constraints on early universe scenarios that generate primordial NG, including general single-field models of inflation, axion inflation, initial state modifications, models producing parity-violating tensor bispectra, and directionally dependent vector models. We present a wide survey of scale-dependent feature and resonance models, accounting for the look elsewhere effect in estimating the statistical significance of features. We also look for isocurvature NG, and find no signal, but we obtain constraints that improve significantly with the inclusion of polarization. The primordial trispectrum amplitude in the local model is constrained to be g(NL)(local) = (9.0 +/- 7.7) x 10(4) (68% CL statistical), and we perform an analysis of trispectrum shapes beyond the local case. The global picture that emerges is one of consistency with the premises of the Lambda CDM cosmology, namely that the structure we observe today was sourced by adiabatic, passive, Gaussian, and primordial seed perturbations.

  • 1199. Ade, P. A. R.
    et al.
    Aghanim, N.
    Arnaud, M.
    Ashdown, M.
    Aumont, J.
    Baccigalupi, C.
    Banday, A. J.
    Barreiro, R. B.
    Bartlett, J. G.
    Bartolo, N.
    Basak, S.
    Battaner, E.
    Benabed, K.
    Benoit, A.
    Benoit-Levy, A.
    Bernard, J. -P.
    Bersanelli, M.
    Bielewicz, P.
    Bock, J. J.
    Bonaldi, A.
    Bonavera, L.
    Bond, J. R.
    Borrill, J.
    Bouchet, F. R.
    Boulanger, F.
    Bucher, M.
    Burigana, C.
    Butler, R. C.
    Calabrese, E.
    Cardoso, J. -F.
    Catalano, A.
    Challinor, A.
    Chamballu, A.
    Chiang, H. C.
    Christensen, P. R.
    Church, S.
    Clements, D. L.
    Colombi, S.
    Colombo, L. P. L.
    Combet, C.
    Couchot, F.
    Coulais, A.
    Crill, B. P.
    Curto, A.
    Cuttaia, F.
    Danese, L.
    Davies, R. D.
    Davis, R. J.
    de Bernardis, P.
    de Rosa, A.
    de Zotti, G.
    Delabrouille, J.
    Desert, F. -X.
    Diego, J. M.
    Dole, H.
    Donzelli, S.
    Dore, O.
    Douspis, M.
    Ducout, A.
    Dunkley, J.
    Dupac, X.
    Efstathiou, G.
    Elsner, F.
    Ensslin, T. A.
    Eriksen, H. K.
    Fergusson, J.
    Finelli, F.
    Forni, O.
    Frailis, M.
    Fraisse, A. A.
    Franceschi, E.
    Frejsel, A.
    Galeotta, S.
    Gallin, S.
    Ganga, K.
    Giard, M.
    Giraud-Heraud, Y.
    Gjerlow, E.
    Gonzalez-Nuevo, J.
    Gorski, K. M.
    Gratton, S.
    Gregorio, A.
    Gruppuso, A.
    Gudmundsson, Jón E.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Princeton University, USA.
    Hansen, F. K.
    Hanson, D.
    Harrison, D. L.
    Henrot-Versille, S.
    Hernandez-Monteagudo, C.
    Herranz, D.
    Hildebrandt, S. R.
    Hivon, E.
    Hobson, M.
    Holmes, W. A.
    Hornstrup, A.
    Hovest, W.
    Huffenberger, K. M.
    Hurier, G.
    Jaffe, A. H.
    Jaffe, T. R.
    Jones, W. C.
    Juvela, M.
    Keihanen, E.
    Keskitalo, R.
    Kisner, T. S.
    Kneissl, R.
    Knoche, J.
    Kunz, M.
    Kurki-Suonio, H.
    Lagache, G.
    Lahteenmaki, A.
    Lamarre, J. -M.
    Lasenby, A.
    Lattanzi, M.
    Lawrence, C. R.
    Leonardi, R.
    Lesgourgues, J.
    Levrier, F.
    Lewis, A.
    Liguori, M.
    Lilje, P. B.
    Linden-Vornle, M.
    Lopez-Caniego, M.
    Lubin, P. M.
    Macias-Perez, J. F.
    Maggio, G.
    Maino, D.
    Mandolesi, N.
    Mangilli, A.
    Maris, M.
    Martin, P. G.
    Martinez-Gonzalez, E.
    Masi, S.
    Matarrese, S.
    McGehee, P.
    Meinhold, P. R.
    Melchiorri, A.
    Mendes, L.
    Mennella, A.
    Migliaccio, M.
    Mitra, S.
    Miville-Deschenes, M. -A.
    Moneti, A.
    Montier, L.
    Morgante, G.
    Mortlock, D.
    Moss, A.
    Munshi, D.
    Murphy, J. A.
    Naselsky, P.
    Nati, F.
    Natoli, P.
    Netterfield, C. B.
    Norgaard-Nielsen, H. U.
    Noviello, F.
    Novikov, D.
    Novikov, I.
    Oxborrow, C. A.
    Paci, F.
    Pagano, L.
    Pajot, F.
    Paoletti, D.
    Pasian, F.
    Patanchon, G.
    Perdereau, O.
    Perotto, L.
    Perrotta, F.
    Pettorino, V.
    Piacentini, F.
    Piat, M.
    Pierpaoli, E.
    Pietrobon, D.
    Plaszczynski, S.
    Pointecouteau, E.
    Polenta, G.
    Popa, L.
    Pratt, G. W.
    Prezeau, G.
    Prunet, S.
    Puget, J. -L.
    Rachen, J. P.
    Reach, W. T.
    Rebolo, R.
    Reinecke, M.
    Remazeilles, M.
    Renault, C.
    Renzi, A.
    Ristorcelli, I.
    Rocha, G.
    Rosset, C.
    Rossetti, M.
    Roudier, G.
    Rowan-Robinson, M.
    Rubino-Martin, J. A.
    Rusholme, B.
    Sandri, M.
    Santos, D.
    Savelainen, M.
    Savini, G.
    Scott, D.
    Seiffert, M. D.
    Shellard, E. P. S.
    Spencer, L. D.
    Stolyarov, V.
    Stompor, R.
    Sudiwala, R.
    Sunyaev, R.
    Sutton, D.
    Suur-Uski, A. -S.
    Sygnet, J. -F.
    Tauber, J. A.
    Terenzi, L.
    Toffolatti, L.
    Tomasi, M.
    Tristram, M.
    Tucci, M.
    Tuovinen, J.
    Valenziano, L.
    Valiviita, J.
    Van Tent, B.
    Vielva, P.
    Villa, F.
    Wade, L. A.
    Wandelt, B. D.
    Wehus, I. K.
    White, M.
    Yvon, D.
    Zacchei, A.
    Zonca, A.
    Planck 2015 results XV. Gravitational lensing2016In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 594, article id A15Article in journal (Refereed)
    Abstract [en]

    We present the most significant measurement of the cosmic microwave background (CMB) lensing potential to date (at a level of 40 sigma), using temperature and polarization data from the Planck 2015 full-mission release. Using a polarization-only estimator, we detect lensing at a significance of 5 sigma. We cross-check the accuracy of our measurement using the wide frequency coverage and complementarity of the temperature and polarization measurements. Public products based on this measurement include an estimate of the lensing potential over approximately 70% of the sky, an estimate of the lensing potential power spectrum in bandpowers for the multipole range 40 <= L <= 400, and an associated likelihood for cosmological parameter constraints. We find good agreement between our measurement of the lensing potential power spectrum and that found in the Lambda CDM model that best fits the Planck temperature and polarization power spectra. Using the lensing likelihood alone we obtain a percent-level measurement of the parameter combination sigma(8) Omega(0.25)(m) = 0.591 +/- 0.021. We combine our determination of the lensing potential with the E-mode polarization, also measured by Planck, to generate an estimate of the lensing B-mode. We show that this lensing B-mode estimate is correlated with the B-modes observed directly by Planck at the expected level and with a statistical significance of 10 sigma, confirming Planck's sensitivity to this known sky signal. We also correlate our lensing potential estimate with the large-scale temperature anisotropies, detecting a cross-correlation at the 3 sigma level, as expected because of dark energy in the concordance Lambda CDM model.

  • 1200. Ade, P. A. R.
    et al.
    Aghanim, N.
    Arnaud, M.
    Ashdown, M.
    Aumont, J.
    Baccigalupi, C.
    Banday, A. J.
    Barreiro, R. B.
    Bartlett, J. G.
    Bartolo, N.
    Battaner, E.
    Battye, R.
    Benabed, K.
    Benoit, A.
    Benoit-Levy, A.
    Bernard, J. -P.
    Bersanelli, M.
    Bielewicz, P.
    Bock, J. J.
    Bonaldi, A.
    Bonavera, L.
    Bond, J. R.
    Borrinll, J.
    Bouchet, F. R.
    Bucher, M.
    Burigana, C.
    Butler, R. C.
    Calabrese, E.
    Cardoso, J. -F.
    Catalano, A.
    Challinor, A.
    Chamballu, A.
    Chary, R. -R.
    Chiang, H. C.
    Christensen, P. R.
    Church, S.
    Clements, D. L.
    Colombi, S.
    Colombo, L. P. L.
    Combet, C.
    Comis, B.
    Couchot, F.
    Coulais, A.
    Crill, B. P.
    Curto, A.
    Cuttaia, F.
    Danese, L.
    Davies, R. D.
    Davis, R. J.
    de Bernardis, P.
    de Rosa, A.
    de Zotti, G.
    Delabrouille, J.
    Desert, F. -X.
    Diego, J. M.
    Dolag, K.
    Dole, H.
    Donzelli, S.
    Dore, O.
    Douspis, M.
    Ducout, A.
    Dupac, X.
    Efstathiou, G.
    Elsner, F.
    Ensslin, T. A.
    Eriksen, H. K.
    Falgarone, E.
    Fergusson, J.
    Finelli, F.
    Forni, O.
    Frailis, M.
    Fraisse, A. A.
    Franceschi, E.
    Frejsel, A.
    Galeotta, S.
    Galli, S.
    Ganga, K.
    Giard, M.
    Giraud-Heraud, Y.
    Gjerlow, E.
    Gonzalez-Nuevo, J.
    Gorski, K. M.
    Gratton, S.
    Gregorio, A.
    Gruppuso, A.
    Gudmundsson, Jón E.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Princeton University, USA.
    Hansen, F. K.
    Hanson, D.
    Harrison, D. L.
    Henrot-Versille, S.
    Hernandez-Monteagudo, C.
    Herranz, D.
    Hildebrandt, S. R.
    Hivon, E.
    Hobson, M.
    Holmes, W. A.
    Hornstrup, A.
    Hovest, W.
    Huffenberger, K. M.
    Hurier, G.
    Jaffe, A. H.
    Jaffe, T. R.
    Jones, W. C.
    Juvela, M.
    Keihanen, E.
    Keskitalo, R.
    Kisner, T. S.
    Kneissl, R.
    Knoche, J.
    Kunzo, M.
    Kurki-Suonio, H.
    Lagache, G.
    Lahteennmaki, A.
    Lamarre, J. -M.
    Lasenby, A.
    Lattanzi, M.
    Lawrence, C. R.
    Leonardi, R.
    Lesgourgues, J.
    Levrier, F.
    Liguori, M.
    Lilje, P. B.
    Linden-Vornle, M.
    Lopez-Caniego, M.
    Lubin, P. M.
    Macias-Perez, J. F.
    Maggio, G.
    Maino, D.
    Mandolesi, N.
    Mangilli, A.
    Maris, M.
    Martin, P. G.
    Martinez-Gonzalez, E.
    Masi, S.
    Matarrese, S.
    McGehee, P.
    Meinhold, P. R.
    Melchiorri', A.
    Melin, J. -B.
    Mendes, L.
    Mennella, A.
    Migliaccio, M.
    Mitrao, S.
    Miville-Deschenes, M. -A.
    Moneti, A.
    Montier, L.
    Morgante, G.
    Mortlock, D.
    Moss, A.
    Munshi, D.
    Murphy, J. A.
    Naselsky, P.
    Nati, F.
    Natoli, P.
    Netterfield, C. B.
    Norgaard-Nielsen, H. U.
    Noviello, F.
    Novikov, D.
    Novikov, I.
    Oxborrow, C. A.
    Paci, F.
    Pagano, L.
    Pajot, F.
    Paoletti, D.
    Partridge, B.
    Pasian, F.
    Patanchon, G.
    Pearson, T. J.
    Perdereau, O.
    Perotto, L.
    Perrotta, F.
    Pettorino, V.
    Piacentini, F.
    Piat, M.
    Pierpaoli, E.
    Pietrobon, D.
    Plaszczynski, S.
    Pointecouteau, E.
    Polenta, G.
    Popa, L.
    Prate, G. W.
    Prezeau, G.
    Prunet, S.
    Puget, J. -L.
    Rachen, J. P.
    Rebolo, R.
    Reinecke, M.
    Remazeilles, M.
    Renault, C.
    Renzi, A.
    Ristorcelli, I.
    Rocha, G.
    Roman, M.
    Rosset, C.
    Rossetti, M.
    Roudier, G.
    Rubino-Martin, J. A.
    Rusholme, B.
    Sandri, M.
    Santos, D.
    Savelainen, M.
    Savini, G.
    Scott, D.
    Seiffert, M. D.
    Shellard, E. P. S.
    Spencer, L. D.
    Stolyarov, V.
    Stompor, R.
    Sudiwala, R.
    Sunyaev, R.
    Sutton, D.
    Suur-Uski, A. -S.
    Sygnet, J. -F.
    Tauber, J. A.
    Terenzi, L.
    Toffolatti, L.
    Tomasi, M.
    Tristram, M.
    Tucci, M.
    Tuovinen, J.
    Turler, M.
    Umana, G.
    Valenziano, L.
    Valiviita', J.
    Van Tent, B.
    Vielva, P.
    Villa, F.
    Wade, L. A.
    Wandelt, B. D.
    Wehus, I. K.
    Weller, J.
    White, S. D. M.
    Yvon, D.
    Zacchei, A.
    Zonca, A.
    XXIV. Cosmology from Sunyaev-Zeldovich cluster counts2016In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 594, article id A24Article in journal (Refereed)
    Abstract [en]

    We present cluster counts and corresponding cosmological constraints from the Planck full mission data set. Our catalogue consists of 439 clusters detected via their Sunyaev-Zeldovich (SZ) signal down to a signal-to-noise ratio of 6, and is more than a factor of 2 larger than the 2013 Planck cluster cosmology sample. The counts are consistent with those from 2013 and yield compatible constraints under the same modelling assumptions. Taking advantage of the larger catalogue, we extend our analysis to the two-dimensional distribution in redshift and signal-to-noise. We use mass estimates from two recent studies of gravitational lensing of background galaxies by Planck clusters to provide priors on the hydrostatic bias parameter, (1 - b). In addition, we use lensing of cosmic microwave background (CMB) temperature fluctuations by Planck clusters as an independent constraint on this parameter. These various calibrations imply constraints on the present-day amplitude of matter fluctuations in varying degrees of tension with those from the Planck analysis of primary fluctuations in the CMB; for the lowest estimated values of (1 b) the tension is mild, only a little over one standard deviation, while it remains substantial (3.7 sigma) for the largest estimated value. We also examine constraints on extensions to the base flat Lambda CDM model by combining the cluster and CMB constraints. The combination appears to favour non-minimal neutrino masses, but this possibility does little to relieve the overall tension because it simultaneously lowers the implied value of the Hubble parameter, thereby exacerbating the discrepancy with most current astrophysical estimates. Improving the precision of cluster mass calibrations from the current 10%-level to 1% would significantly strengthen these combined analyses and provide a stringent test of the base Lambda CDM model.

21222324252627 1151 - 1200 of 109636
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