Sterile dark matter and reionization

Details Sterile dark matter and reionization Sterile dark matter and reionization

2006-09-13

arxiv.org/abs/astro-ph/0609375v1

Nucl.Phys.Proc.Suppl.173:24-27,2007

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, to appear in proceedings of 7th UCLA Symposium on sources and detection of dark matter and dark energy in

Scientific paper

10.1016/j.nuclphysbps.2007.08.14

Sterile neutrinos with masses in the keV range can be the dark matter, and their emission from a supernova can explain the observed velocities of pulsars. The sterile neutrino decays could produce the x-ray radiation in the early universe, which could have an important effect on the formation of the first stars. X-rays could ionize gas and could catalyze the production of molecular hydrogen during the ``dark ages''. The increased fraction of molecular hydrogen could facilitate the cooling and collapse of the primordial gas clouds in which the first stars were formed.

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