Photon enhancement in a homogeneous axion dark matter background
High Energy Physics - Phenomenology
2020-04-07 v2 Astrophysics of Galaxies
Abstract
We study the propagation of photons in a homogeneous axion dark matter background. When the axion decay into two photons is stimulated, the photon field exhibits a parametric instability in a small bandwidth centered on one half of the axion mass. We estimate analytically the enhancement for both coherent and non-coherent axion fields and we find that this effect could be relevant in the context of miniclusters and galactic halos.
Keywords
Cite
@article{arxiv.1810.03722,
title = {Photon enhancement in a homogeneous axion dark matter background},
author = {Ariel Arza},
journal= {arXiv preprint arXiv:1810.03722},
year = {2020}
}
Comments
4 pages, 3 figures