Decaying Dark Matter in Halos of Primordial Black Holes
Cosmology and Nongalactic Astrophysics
2019-08-20 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We investigate photon signatures of general decaying dark-matter particles in halos of primordial black holes. We derive the halo-profile density and the total decay rate for these combined dark-matter scenarios. For the case of axion-like particles of masses below keV, we find strong bounds on the decay constant which are several orders of magnitude stronger than the strongest existing bounds, for all halo masses above solar masses. Using future X-ray measurements, it will be possible to push these bounds on such combined dark-matter scenarios even further.
Keywords
Cite
@article{arxiv.1811.05810,
title = {Decaying Dark Matter in Halos of Primordial Black Holes},
author = {Florian Kuhnel and Tommy Ohlsson},
journal= {arXiv preprint arXiv:1811.05810},
year = {2019}
}
Comments
5 pages, 3 figures; v2: revised in order to match published version