Implications of primordial black holes on the first stars and the origin of the super--massive black holes

Abstract

If the cosmological dark matter has a component made of small primordial black holes, they may have a significant impact on the physics of the first stars and on the subsequent formation of massive black holes. Primordial black holes would be adiabatically contracted into these stars and then would sink to the stellar center by dynamical friction, creating a larger black hole which may quickly swallow the whole star. If these primordial black holes are heavier than $\sim 10^{22}\mathrm{g}$, the first stars would likely live only for a very short time and would not contribute much to the reionization of the universe. They would instead become $10-10^3{M}_{\odot }$ black holes which (depending on subsequent accretion) could serve as seeds for the super--massive black holes seen at high redshifts as well as those inside galaxies today.

16 pages, 2 figures. v2: refereed version

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Cited by in corpus (4)

• Relic gravitational waves from light primordial black holes
• Effects of stellar-mass primordial black holes on first star formation
• Primordial black holes captured by neutron stars: relativistic point-mass treatment
• Primordial black holes capture by stars and induced collapse to low-mass stellar black holes