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Article overview
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A new calculation of the mass fraction of primordial black holes | Anne M. Green
; Andrew R. Liddle
; Karim A. Malik
; Misao Sasaki
; | Date: |
8 Mar 2004 | Journal: | Phys.Rev. D70 (2004) 041502 | Subject: | astro-ph | 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 $Delta_{{
m th}} simeq 0.3$ to 0.5, but advocate use of the peaks theory expression which is based on a sounder theoretical footing. | Source: | arXiv, astro-ph/0403181 | Services: | Forum | Review | PDF | Favorites |
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