DO DARK DARK STARS EXIST?
Such a circumstance may have been commonplace shortly after the big bang, for dark matter outweighs the normal sort by a factor of six . Now a paper has appeared calculating the consequences- the virial theorem predicts heating of the mixture by dark matter annihilation as neutralinos collide may be too great to allow condensation to normal stellar densities, resulting in giants stars that glow without nuclear fusion., kept from igniting by the radiation pressure of annihilation gamma rays within the enormous sphere
Up to 15,000 solar masses , and the size of the Earth's orbit, or larger, these Dark Matter Stars may stlll be sulking out of observational sight but detectable by their energetic gamma rays-- over 100 gev for nu-nu driven processes
Douglas Spolyar , Katherine Freese and Paolo Gondolo give a preliminary account in a paper available from Arxiv Astrophysics --
and Science has a news report for subscribers as well