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:
Journal Article
Journal or Publication Title:
Physical Review D
Uncontrolled Keywords:
/dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
ID Code:
23926
Deposited By:
Deposited On:
24 Feb 2009 09:14
Refereed?:
Yes
Published?:
Published
Last Modified:
20 Oct 2020 10:54