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A new calculation of the mass fraction of primordial black holes

Green, Anne M. and Liddle, Andrew R. and Malik, Karim A. and Sasaki, Misao (2004) A 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
Journal or Publication Title: Physical Review D
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 23926
Deposited By: ep_ss_importer
Deposited On: 24 Feb 2009 09:14
Refereed?: Yes
Published?: Published
Last Modified: 21 Oct 2014 11:43
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/23926

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