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, 70 (4). 041502. ISSN 0556-2821
Full text not available from this repository.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 |
| 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: | 26 Jul 2012 16:18 |
| Identification Number: | |
| URI: | http://eprints.lancs.ac.uk/id/eprint/23926 |
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