Tracing primordial black holes in nonsingular bouncing cosmology

We in this paper investigate the formation and evolution of primordial black holes (PBHs) in nonsingular bouncing cosmologies. We discuss the formation of PBH in the contracting phase and calculate the PBH abundance as a function of the sound speed and Hubble parameter. Afterwards, by taking into ac...

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Bibliographic Details
Published in:Physics letters. B 2017-06, Vol.769 (C), p.561-568
Main Authors: Chen, Jie-Wen, Liu, Junyu, Xu, Hao-Lan, Cai, Yi-Fu
Format: Article
Language:English
Subjects:
Physics
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Summary:We in this paper investigate the formation and evolution of primordial black holes (PBHs) in nonsingular bouncing cosmologies. We discuss the formation of PBH in the contracting phase and calculate the PBH abundance as a function of the sound speed and Hubble parameter. Afterwards, by taking into account the subsequent PBH evolution during the bouncing phase, we derive the density of PBHs and their Hawking radiation. Our analysis shows that nonsingular bounce models can be constrained from the backreaction of PBHs.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2017.03.036