Dark Matter and General Relativistic Instability in Supermassive Stars

Abstract

We calculate the extent to which collisionless dark matter impacts the stability of supermassive stars $(M\gtrsim 10^4{M}_{\odot })$. We find that, depending on the star's mass, a dark matter content in excess of $\sim 1\%$ by mass throughout the entire star can raise the critical central density for the onset general relativistic instability, in some cases by orders of magnitude. We consider implications of this effect for the onset of nuclear burning and significant neutrino energy losses.

arXiv comment13 pages, 4 figures V3: added references, added section of new analysis with two new figures, overall results unaltered, added journal reference

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