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  • 1. Ade, Peter
    et al.
    Aguirre, James
    Ahmed, Zeeshan
    Aiola, Simone
    Ali, Aamir
    Alonso, David
    Alvarez, Marcelo A.
    Arnold, Kam
    Ashton, Peter
    Austermann, Jason
    Awan, Humna
    Baccigalupi, Carlo
    Baildon, Taylor
    Barron, Darcy
    Battaglia, Nick
    Battye, Richard
    Baxter, Eric
    Bazarko, Andrew
    Beall, James A.
    Bean, Rachel
    Beck, Dominic
    Beckman, Shawn
    Beringue, Benjamin
    Bianchini, Federico
    Boada, Steven
    Boettger, David
    Bond, J. Richard
    Borrill, Julian
    Brown, Michael L.
    Bruno, Sarah Marie
    Bryan, Sean
    Calabrese, Erminia
    Calafut, Victoria
    Calisse, Paolo
    Carron, Julien
    Challinor, Anthony
    Chesmore, Grace
    Chinone, Yuji
    Chluba, Jens
    Cho, Hsiao-Mei Sherry
    Choi, Steve
    Coppi, Gabriele
    Cothard, Nicholas F.
    Coughlin, Kevin
    Crichton, Devin
    Crowley, Kevin D.
    Crowley, Kevin T.
    Cukierman, Ari
    D'Ewart, John M.
    Dunner, Rolando
    de Haan, Tijmen
    Devlin, Mark
    Dicker, Simon
    Didier, Joy
    Dobbs, Matt
    Dober, Bradley
    Duell, Cody J.
    Duff, Shannon
    Duivenvoorden, Adri
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Dunkley, Jo
    Dusatko, John
    Errard, Josquin
    Fabbian, Giulio
    Feeney, Stephen
    Ferraro, Simone
    Fluxa, Pedro
    Freese, Katherine
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). University of Michigan, U.S.A..
    Frisch, Josef C.
    Frolov, Andrei
    Fuller, George
    Fuzia, Brittany
    Galitzki, Nicholas
    Gallardo, Patricio A.
    Ghersi, Jose Tomas Galvez
    Gao, Jiansong
    Gawiser, Eric
    Gerbino, Martina
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Gluscevic, Vera
    Goeckner-Wald, Neil
    Golec, Joseph
    Gordon, Sam
    Gralla, Megan
    Green, Daniel
    Grigorian, Arpi
    Groh, John
    Groppi, Chris
    Guan, Yilun
    Gudmundsson, Jon E.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Han, Dongwon
    Hargrave, Peter
    Hasegawa, Masaya
    Hasselfield, Matthew
    Hattori, Makoto
    Haynes, Victor
    Hazumi, Masashi
    He, Yizhou
    Healy, Erin
    Henderson, Shawn W.
    Hervias-Caimapo, Carlos
    Hill, Charles A.
    Hill, J. Colin
    Hilton, Gene
    Hilton, Matt
    Hincks, Adam D.
    Hinshaw, Gary
    Hlozek, Renee
    Ho, Shirley
    Ho, Shuay-Pwu Patty
    Howe, Logan
    Huang, Zhiqi
    Hubmayr, Johannes
    Huffenberger, Kevin
    Hughes, John P.
    Ijjas, Anna
    Ikape, Margaret
    Irwin, Kent
    Jaffe, Andrew H.
    Jain, Bhuvnesh
    Jeong, Oliver
    Kaneko, Daisuke
    Karpel, Ethan D.
    Katayama, Nobuhiko
    Keating, Brian
    Kernasovskiy, Sarah S.
    Keskitalo, Reijo
    Kisner, Theodore
    Kiuchi, Kenji
    Klein, Jeff
    Knowles, Kenda
    Koopman, Brian
    Kosowsky, Arthur
    Krachmalnicoff, Nicoletta
    Kuenstner, Stephen E.
    Kuo, Chao-Lin
    Kusaka, Akito
    Lashner, Jacob
    Lee, Adrian
    Lee, Eunseong
    Leon, David
    Leung, Jason S-Y
    Lewis, Antony
    Li, Yaqiong
    Li, Zack
    Limon, Michele
    Linder, Eric
    Lopez-Caraballo, Carlos
    Louis, Thibaut
    Lowry, Lindsay
    Lungu, Marius
    Madhavacheril, Mathew
    Mak, Daisy
    Maldonado, Felipe
    Mani, Hamdi
    Mates, Ben
    Matsuda, Frederick
    Maurin, Loic
    Mauskopf, Phil
    May, Andrew
    McCallum, Nialh
    McKenney, Chris
    McMahon, Jeff
    Meerburg, P. Daniel
    Meyers, Joel
    Miller, Amber
    Mirmelstein, Mark
    Moodley, Kavilan
    Munchmeyer, Moritz
    Munson, Charles
    Naess, Sigurd
    Nati, Federico
    Navaroli, Martin
    Newburgh, Laura
    Ho, Nam
    Niemack, Michael
    Nishino, Haruki
    Orlowski-Scherer, John
    Page, Lyman
    Partridge, Bruce
    Peloton, Julien
    Perrotta, Francesca
    Piccirillo, Lucio
    Pisano, Giampaolo
    Poletti, Davide
    Puddu, Roberto
    Puglisi, Giuseppe
    Raum, Chris
    Reichardt, Christian L.
    Remazeilles, Mathieu
    Rephaeli, Yoel
    Riechers, Dominik
    Rojas, Felipe
    Roy, Anirban
    Sadeh, Sharon
    Sakurail, Yuki
    Salatino, Maria
    Rao, Mayuri Sathyanarayana
    Schaan, Emmanuel
    Schmittfull, Marcel
    Sehgal, Neelima
    Seibert, Joseph
    Seljak, Uros
    Sherwin, Blake
    Shimon, Meir
    Sierra, Carlos
    Sievers, Jonathan
    Sikhosana, Precious
    Silva-Feaver, Maximiliano
    Simon, Sara M.
    Sinclair, Adrian
    Siritanasak, Praween
    Smith, Kendrick
    Smith, Stephen R.
    Spergel, David
    Staggs, Suzanne T.
    Stein, George
    Stevens, Jason R.
    Stompor, Radek
    Suzuki, Aritoki
    Tajima, Osamu
    Takakura, Satoru
    Teply, Grant
    Thomas, Daniel B.
    Thorne, Ben
    Thornton, Robert
    Trac, Hy
    Tsai, Calvin
    Tucker, Carole
    Ullom, Joel
    Vagnozzi, Sunny
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    van Engelen, Alexander
    Van Lanen, Jeff
    Van Winkle, Daniel D.
    Vavagiakis, Eve M.
    Verges, Clara
    Vissers, Michael
    Wagoner, Kasey
    Walker, Samantha
    Ward, Jon
    Westbrook, Ben
    Whitehorn, Nathan
    Williams, Jason
    Williams, Joel
    Wollack, Edward J.
    Xu, Zhilei
    Yu, Byeonghee
    Yu, Cyndia
    Zago, Fernando
    Zhang, Hezi
    Zhu, Ningfeng
    The Simons Observatory: science goals and forecasts2019In: Journal of Cosmology and Astroparticle Physics, ISSN 1475-7516, E-ISSN 1475-7516, no 2, article id 056Article in journal (Refereed)
    Abstract [en]

    The Simons Observatory (SO) is a new cosmic microwave background experiment being built on Cerro Toco in Chile, due to begin observations in the early 2020s. We describe the scientific goals of the experiment, motivate the design, and forecast its performance. SO will measure the temperature and polarization anisotropy of the cosmic microwave background in six frequency bands centered at: 27, 39, 93, 145, 225 and 280 GHz. The initial con figuration of SO will have three small-aperture 0.5-m telescopes and one large-aperture 6-m telescope, with a total of 60,000 cryogenic bolometers. Our key science goals are to characterize the primordial perturbations, measure the number of relativistic species and the mass of neutrinos, test for deviations from a cosmological constant, improve our understanding of galaxy evolution, and constrain the duration of reionization. The small aperture telescopes will target the largest angular scales observable from Chile, mapping approximate to 10% of the sky to a white noise level of 2 mu K-arcmin in combined 93 and 145 GHz bands, to measure the primordial tensor-to-scalar ratio, r, at a target level of sigma(r) = 0.003. The large aperture telescope will map approximate to 40% of the sky at arcminute angular resolution to an expected white noise level of 6 mu K-arcmin in combined 93 and 145 GHz bands, overlapping with the majority of the Large Synoptic Survey Telescope sky region and partially with the Dark Energy Spectroscopic Instrument. With up to an order of magnitude lower polarization noise than maps from the Planck satellite, the high-resolution sky maps will constrain cosmological parameters derived from the damping tail, gravitational lensing of the microwave background, the primordial bispectrum, and the thermal and kinematic Sunyaev-Zel'dovich effects, and will aid in delensing the large-angle polarization signal to measure the tensor-to-scalar ratio. The survey will also provide a legacy catalog of 16,000 galaxy clusters and more than 20,000 extragalactic sources.

  • 2. Sugai, H.
    et al.
    Ade, P. A. R.
    Akiba, Y.
    Alonso, D.
    Arnold, K.
    Aumont, J.
    Austermann, J.
    Baccigalupi, C.
    Banday, A. J.
    Banerji, R.
    Barreiro, R. B.
    Basak, S.
    Beall, J.
    Beckman, S.
    Bersanelli, M.
    Borrill, J.
    Boulanger, F.
    Brown, M. L.
    Bucher, M.
    Buzzelli, A.
    Calabrese, E.
    Casas, F. J.
    Challinor, A.
    Chan, V.
    Chinone, Y.
    Cliche, J. -F.
    Columbro, F.
    Cukierman, A.
    Curtis, D.
    Danto, P.
    de Bernardis, P.
    de Haan, T.
    De Petris, M.
    Dickinson, C.
    Dobbs, M.
    Dotani, T.
    Duband, L.
    Ducout, A.
    Duff, S.
    Duivenvoorden, Adri
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Duval, J. -M.
    Ebisawa, K.
    Elleflot, T.
    Enokida, H.
    Eriksen, H. K.
    Errard, J.
    Essinger-Hileman, T.
    Finelli, F.
    Flauger, R.
    Franceschet, C.
    Fuskeland, U.
    Ganga, K.
    Gao, J. -R.
    Genova-Santos, R.
    Ghigna, T.
    Gomez, A.
    Gradziel, M. L.
    Grain, J.
    Grupp, F.
    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).
    Halverson, N. W.
    Hargrave, P.
    Hasebe, T.
    Hasegawa, M.
    Hattori, M.
    Hazumi, M.
    Henrot-Versille, S.
    Herranz, D.
    Hill, C.
    Hilton, G.
    Hirota, Y.
    Hivon, E.
    Hlozek, R.
    Hoang, D. -T.
    Hubmayr, J.
    Ichiki, K.
    Iida, T.
    Imada, H.
    Ishimura, K.
    Ishino, H.
    Jaehnig, G. C.
    Jones, M.
    Kaga, T.
    Kashima, S.
    Kataoka, Y.
    Katayama, N.
    Kawasaki, T.
    Keskitalo, R.
    Kibayashi, A.
    Kikuchi, T.
    Kimura, K.
    Kisner, T.
    Kobayashi, Y.
    Kogiso, N.
    Kogut, A.
    Kohri, K.
    Komatsu, E.
    Komatsu, K.
    Konishi, K.
    Krachmalnicoff, N.
    Kuo, C. L.
    Kurinsky, N.
    Kushino, A.
    Kuwata-Gonokami, M.
    Lamagna, L.
    Lattanzi, M.
    Lee, A. T.
    Linder, E.
    Maffei, B.
    Maino, D.
    Maki, M.
    Mangilli, A.
    Martinez-Gonzalez, E.
    Masi, S.
    Mathon, R.
    Matsumura, T.
    Mennella, A.
    Migliaccio, M.
    Minami, Y.
    Mistuda, K.
    Molinari, D.
    Montier, L.
    Morgante, G.
    Mot, B.
    Murata, Y.
    Murphy, J. A.
    Nagai, M.
    Nagata, R.
    Nakamura, S.
    Namikawa, T.
    Natoli, P.
    Nerval, S.
    Nishibori, T.
    Nishino, H.
    Nomura, Y.
    Noviello, F.
    O'Sullivan, C.
    Ochi, H.
    Ogawa, H.
    Ogawa, H.
    Ohsaki, H.
    Ohta, I.
    Okada, N.
    Okada, N.
    Pagano, L.
    Paiella, A.
    Paoletti, D.
    Patanchon, G.
    Piacentini, F.
    Pisano, G.
    Polenta, G.
    Poletti, D.
    Prouve, T.
    Puglisi, G.
    Rambaud, D.
    Raum, C.
    Realini, S.
    Remazeilles, M.
    Roudil, G.
    Rubino-Martin, J. A.
    Russell, M.
    Sakurai, H.
    Sakurai, Y.
    Sandri, M.
    Savini, G.
    Scott, D.
    Sekimoto, Y.
    Sherwin, B. D.
    Shinozaki, K.
    Shiraishi, M.
    Shirron, P.
    Signorelli, G.
    Smecher, G.
    Spizzi, P.
    Stever, S. L.
    Stompor, R.
    Sugiyama, S.
    Suzuki, A.
    Suzuki, J.
    Switzer, E.
    Takaku, R.
    Takakura, H.
    Takakura, S.
    Takeda, Y.
    Taylor, A.
    Taylor, E.
    Terao, Y.
    Thompson, K. L.
    Thorne, B.
    Tomasi, M.
    Tomida, H.
    Trappe, N.
    Tristram, M.
    Tsuji, M.
    Tsujimoto, M.
    Tucker, C.
    Ullom, J.
    Uozumi, S.
    Utsunomiya, S.
    Van Lanen, J.
    Vermeulen, G.
    Vielva, P.
    Villa, F.
    Vissers, M.
    Vittorio, N.
    Voisin, F.
    Walker, I.
    Watanabe, N.
    Wehus, I.
    Weller, J.
    Westbrook, B.
    Winter, B.
    Wollack, E.
    Yamamoto, R.
    Yamasaki, N. Y.
    Yanagisawa, M.
    Yoshida, T.
    Yumoto, J.
    Zannoni, M.
    Zonca, A.
    Updated Design of the CMB Polarization Experiment Satellite LiteBIRD2020In: Journal of Low Temperature Physics, ISSN 0022-2291, E-ISSN 1573-7357Article in journal (Refereed)
    Abstract [en]

    Recent developments of transition-edge sensors (TESs), based on extensive experience in ground-based experiments, have been making the sensor techniques mature enough for their application on future satellite cosmic microwave background (CMB) polarization experiments. LiteBIRD is in the most advanced phase among such future satellites, targeting its launch in Japanese Fiscal Year 2027 (2027FY) with JAXA's H3 rocket. It will accommodate more than 4000 TESs in focal planes of reflective low-frequency and refractive medium-and-high-frequency telescopes in order to detect a signature imprinted on the CMB by the primordial gravitational waves predicted in cosmic inflation. The total wide frequency coverage between 34 and 448 GHz enables us to extract such weak spiral polarization patterns through the precise subtraction of our Galaxy's foreground emission by using spectral differences among CMB and foreground signals. Telescopes are cooled down to 5 K for suppressing thermal noise and contain polarization modulators with transmissive half-wave plates at individual apertures for separating sky polarization signals from artificial polarization and for mitigating from instrumental 1/f noise. Passive cooling by using V-grooves supports active cooling with mechanical coolers as well as adiabatic demagnetization refrigerators. Sky observations from the second Sun-Earth Lagrangian point, L2, are planned for 3 years. An international collaboration between Japan, the USA, Canada, and Europe is sharing various roles. In May 2019, the Institute of Space and Astronautical Science, JAXA, selected LiteBIRD as the strategic large mission No. 2.

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