Primordial Black Holes as a dark matter candidate
Abstract
The detection of gravitational waves from mergers of tens of Solar mass black hole binaries has led to a surge in interest in Primordial Black Holes (PBHs) as a dark matter candidate. We aim to provide a (relatively) concise overview of the status of PBHs as a dark matter candidate, circa Summer 2020. First we review the formation of PBHs in the early Universe, focusing mainly on PBHs formed via the collapse of large density perturbations generated by inflation. Then we review the various current and future constraints on the present day abundance of PBHs. We conclude with a discussion of the key open questions in this field.
Keywords
Cite
@article{arxiv.2007.10722,
title = {Primordial Black Holes as a dark matter candidate},
author = {Anne M. Green and Bradley J. Kavanagh},
journal= {arXiv preprint arXiv:2007.10722},
year = {2021}
}
Comments
24 pages 3 figures. Concise overview aimed at readers outside field. Intention is not to mention all/most papers published on topic, but to briefly describe origin of calculations, models & constraints, & summarise current status. v2: minor additions & changes, in particular to constraints on PBH abundance and primordial power spectrum. v3: minor changes to presentation to match accepted version