Implications of primordial black holes on the first stars and the origin of the super-massive black holes |
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| Authors: | Cosimo Bambi Douglas Spolyar Alexander D Dolgov Katherine Freese Marta Volonteri |
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| Institution: | IPMU, The University of Tokyo, Kashiwa, Chiba 277-8568, Japan;Department of Physics, University of California, Santa Cruz, CA 95060, USA;Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara, I-44100 Ferrara, Italy;Dipartimento di Fisica, Universitàdegli Studi di Ferrara, I-44100 Ferrara, Italy;Institute of Theoretical and Experimental Physics, 113259 Moscow, Russia;MCTP, University of Michigan, Ann Arbor, MI 48109, USA;Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA |
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| Abstract: | If the cosmological dark matter has a component made of small primordial black holes (BHs), they may have a significant impact on the physics of the first stars and on the subsequent formation of massive BHs. Primordial BHs would be adiabatically contracted into these stars and then would sink to the stellar centre by dynamical friction, creating a larger BH which may quickly swallow the whole star. If these primordial BHs are heavier than ～1022 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 10–103 M⊙ BHs which (depending on subsequent accretion) could serve as seeds for the super-massive BHs seen at high redshifts as well as those inside galaxies today. |
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| Keywords: | black hole physics dark matter early Universe |
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