Spins of primordial binary black holes before coalescence
High Energy Astrophysical Phenomena
2019-06-24 v5 High Energy Physics - Phenomenology
Abstract
Primordial stellar-mass black holes, which may contribute to dark matter and to the observed LIGO binary black hole coalescences, are expected to be born with very low spins. Here we show that accretion mass gain by the components of a primordial black hole binary from the surrounding matter could lead to noticeable spins of the components prior to the coalescence provided high initial orbital eccentricities.
Cite
@article{arxiv.1904.00570,
title = {Spins of primordial binary black holes before coalescence},
author = {Konstantin Postnov and Nikita Mitichkin},
journal= {arXiv preprint arXiv:1904.00570},
year = {2019}
}
Comments
11 pages, 5 figures, accepted to JCAP. Typo in Eq. (3.4) corrected, Fig. 4 substituted. No changes in the conclusions