Green, Anne, Liddle, Andrew, Karim, Malik and Sasaki, Misao (2004) New calculation of the mass fraction of primordial black holes. Physical Review D, 70 (4). ISSN 1550-7998

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Abstract

We revisit the calculation of the abundance of primordial black holes (PBHs) formed from primordial density perturbations, using a formation criterion derived by Shibata and Sasaki which refers to a metric perturbation variable rather than the usual density contrast. We implement a derivation of the PBH abundance which uses peaks theory, and compare it to the standard calculation based on a Press-Schechter-like approach. We find that the two are in reasonable agreement if the Press-Schechter threshold is in the range Δth≃0.3 to 0.5, but advocate use of the peaks theory expression which is based on a sounder theoretical footing.

Item Type:	Article
Schools and Departments:	School of Mathematical and Physical Sciences > Physics and Astronomy
Depositing User:	Andrew Liddle
Date Deposited:	06 Feb 2012 18:14
Last Modified:	03 Jul 2019 00:01
URI:	http://sro.sussex.ac.uk/id/eprint/15382

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