2011/11/16 by Ozgur Erken, Pierre Sikivie, Erken, Ozgur +5
Physics and Astronomy · #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #astro-ph.CO #hep-ph
paper · pdf · doi:10.48550/arxiv.1111.3976
4 pages, no figures, contribution to the Proceedings of the 7th Patras Workshop on Axions, WIMPs and WISPs, Mykonos, Greece, June 26 - July 1, 2011
arxiv created 2011/11/16 · arxiv updated 2011/11/18
Cold dark matter axions thermalize through gravitational self-interactions and form a Bose-Einstein condensate when the photon temperature reaches approximately 500 eV. Axion Bose-Einstein condensation provides an opportunity to distinguish axions from the other dark matter candidates on the basis of observation. The rethermalization of axions that are about to fall in a galactic potential well causes them to acquire net overall rotation, whereas ordinary cold dark matter falls in with an irrotational velocity field. The inner caustics of galactic halos are different in the two cases.