Open AccessMergers of primordial black holes in compact clusters
Author(s) -
Yurii N. Eroshenko
Publication year - 2022
Publication title -
astronomy at the epoch of multimessenger studies. proceedings of the vak-2021 conference, aug 23–28, 2021
Language(s) - English
Resource type - Conference proceedings
DOI - 10.51194/vak2021.2022.1.1.104
Subject(s) - physics , primordial black hole , universe , hubble's law , astrophysics , metric expansion of space , recombination , gravitational wave , dark matter , gravitation , astronomy , radiation , cosmology , dark energy , binary black hole , quantum mechanics , chemistry , biochemistry , gene
It is shown that ∼ 10 % of the total dark matter mass can be transformed into gravitational radiation by primordial blackhole (PBH) mergers inside the compact clusters. If the mass transformation occurred after recombination, but at redshiftsz ≥ 10, the generated gravitational radiation do not contribute to the current density of the Universe. This eect increasesthe rate of cosmological expansion in the era of recombination compared to models without the mass transfer. Accordingly,the Hubble constant, obtained from measurements in the early Universe, changes, which can provide a solution to the“Hubble tension” problem.