Formation and clustering of primordial black holes in Brans-Dicke theory

Autor:	Berezin, V. A., Dokuchaev, V. I., Eroshenko, Yu. N., Smirnov, A. L.
Rok vydání:	2020
Předmět:	Astrophysics - Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology
Zdroj:	Universe 6, 158 (2020)
Druh dokumentu:	Working Paper
DOI:	10.3390/universe6100158
Popis:	The formation of primordial black holes in the early universe in the Brans-Dicke scalar-tensor theory of gravity is investigated. Corrections to the threshold value of density perturbations are found. Above the threshold, the gravitational collapse occurs after the cosmological horizon crossing. The corrections depend in a certain way on the evolving scalar field. They affect the probability of primordial black holes formation, and can lead to their clustering at large scales if the scalar field is inhomogeneous. The formation of the clusters, in turn, increases the probability of black holes merge and the corresponding rate of gravitational wave bursts. The clusters can provide a significant contribution to the LIGO/Virgo gravitational wave events, if part of the observed events are associated with primordial black holes. Comment: 14 pages, 2 figures; Presented at the 17th Russian Gravitational Conference (RUSGRAV-17), Saint Petersburg, Russia; references added, misprints corrected
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2007.15347 Zobrazit plný text záznamu View this record from Arxiv