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Primordial Black Holes in an Accelerating Universe

Authors :
David Polarski
Laboratoire de Physique Mathématique et Théorique (PMT)
Centre National de la Recherche Scientifique (CNRS)-Université Montpellier 2 - Sciences et Techniques (UM2)
Source :
Physics Letters B, Physics Letters B, Elsevier, 2002, 528, pp.193-198. ⟨10.1016/S0370-2693(02)01200-5⟩
Publication Year :
2001
Publisher :
arXiv, 2001.

Abstract

General expressions are given for the generation of Primordial Black Holes (PBH) in a universe with a presently accelerated expansion due to a(n effective) cosmological constant. We give expressions both for a powerlaw scalefree primordial spectrum and for spectra which are not of that type. Specializing to the case of a pure cosmological constant $\Lambda$ and assuming flatness, we show that a comological constant with $\Omega_{\Lambda,0}=0.7$ will decrease the mass variance at the PBH formation time by about 15% compared with a critical density universe.<br />Comment: 9 pages, uses LaTeX, version accepted in Phys. Lett. B, results unchanged

Details

ISSN :
03702693
Database :
OpenAIRE
Journal :
Physics Letters B, Physics Letters B, Elsevier, 2002, 528, pp.193-198. ⟨10.1016/S0370-2693(02)01200-5⟩
Accession number :
edsair.doi.dedup.....fafa56278d8288d7df9c77aba951c718
Full Text :
https://doi.org/10.48550/arxiv.astro-ph/0112328