Statistics – Computation
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987azh....64..673z&link_type=abstract
Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 64, July-Aug. 1987, p. 673-685. In Russian.
Statistics
Computation
Big Bang Cosmology, Black Holes (Astronomy), Computational Astrophysics, Cosmic Dust, Density Distribution, Universe, Evolution (Development), Perturbation Theory
Scientific paper
Formation of primordial black holes (PBHs) is discussed at early dust-like stages of the Universe expansion. These stages arose due to the domination of supermassive unstable particles in the density of the very early universe. Methods of random field peaks theory are applied to calculate the PBHs' mass spectrum. The analysis of the fragmentation role is made at the nonlinear stage of density perturbation evolution. It is shown that, if the frozen concentration of supermassive particles is small enough, the probability of PBH formation is below the limit set by the available astrophysical data, even at comparatively high level of the initial metric perturbations (δ ≅ 10-2 - 10-3).
Naselskij P. D.
Polnarev Alexander G.
Zabotin Nikolay A.
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