Journal
PHYSICS LETTERS B
Volume 695, Issue 1-4, Pages 22-25Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2010.11.027
Keywords
Dark matter; Axions; Bose-Einstein condensation
Funding
- U.S. Department of Energy [DE-FG02-97ER41029]
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Dark matter axions form a rethermalizing Bose-Einstein condensate. This provides an opportunity to distinguish axions from other forms of dark matter on observational grounds. I show that if the dark matter is axions, tidal torque theory predicts a specific structure for the phase space distribution of the halos of isolated disk galaxies, such as the Milky Way. This phase space structure is precisely that of the caustic ring model, for which observational support had been found earlier. The other dark matter candidates predict a different phase space structure for galactic halos. (C) 2010 Elsevier B.V. All rights reserved.
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