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The zero age main sequence of WIMP burners
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics.
2008 (English)In: Physical Review D. Particles and fields, ISSN 0556-2821, E-ISSN 1089-4918, Vol. 77, 047301- p.Article in journal (Refereed) Published
Abstract [en]

We modify a stellar structure code to estimate the effect upon the main sequence of the accretion of weakly-interacting dark matter onto stars and its subsequent annihilation. The effect upon the stars depends upon whether the energy generation rate from dark matter annihilation is large enough to shut off the nuclear burning in the star. Main sequence weakly-interacting massive particles (WIMP) burners look much like proto-stars moving on the Hayashi track, although they are in principle completely stable. We make some brief comments about where such stars could be found, how they might be observed and more detailed simulations which are currently in progress. Finally we comment on whether or not it is possible to link the paradoxically hot, young stars found at the galactic center with WIMP burners.

Place, publisher, year, edition, pages
2008. Vol. 77, 047301- p.
URN: urn:nbn:se:su:diva-38212DOI: 10.1103/PhysRevD.77.047301ISI: 000253764800140OAI: diva2:307837
Available from: 2010-04-01 Created: 2010-04-01 Last updated: 2010-04-06Bibliographically approved
In thesis
1. Searches for Particle Dark Matter: Dark stars, dark galaxies, dark halos and global supersymmetric fits
Open this publication in new window or tab >>Searches for Particle Dark Matter: Dark stars, dark galaxies, dark halos and global supersymmetric fits
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The identity of dark matter is one of the key outstanding problems in both particle and astrophysics. In this thesis, I describe a number of complementary searches for particle dark matter. I discuss how the impact of dark matter on stars can constrain its interaction with nuclei, focussing on main sequence stars close to the Galactic Centre, and on the first stars as seen through the upcoming James Webb Space Telescope. The mass and annihilation cross-section of dark matter particles can be probed with searches for gamma rays produced in astronomical targets. Dwarf galaxies and ultracompact, primordially-produced dark matter minihalos turn out to be especially promising in this respect. I illustrate how the results of these searches can be combined with constraints from accelerators and cosmology to produce a single global fit to all available data. Global fits in supersymmetry turn out to be quite technically demanding, even with the simplest predictive models and the addition of complementary data from a bevy of astronomical and terrestrial experiments; I show how genetic algorithms can help in overcoming these challenges.

Place, publisher, year, edition, pages
Stockholm: Department of Physics, Stockholm University, 2010. 84 p.
dark matter, supersymmetry, gamma rays, dwarf galaxies, stellar evolution, cosmological perturbations, phase transitions, statistical techniques
National Category
Subatomic Physics Subatomic Physics Astronomy, Astrophysics and Cosmology Subatomic Physics Other Physics Topics Astronomy, Astrophysics and Cosmology Astronomy, Astrophysics and Cosmology
Research subject
Theoretical Physics
urn:nbn:se:su:diva-38221 (URN)978-91-7447-031-4 (ISBN)
Public defence
2010-05-04, FD5, AlbaNova universitetscentrum, Roslagstullsbacken 21, Stockholm, 15:15 (English)
At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 5: Accepted. Paper 6: Submitted. Available from: 2010-04-12 Created: 2010-04-01 Last updated: 2010-04-07Bibliographically approved

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Scott, P.Edsjö, J.
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