Two-Component Axionic Dark Matter Halos
High Energy Physics - Phenomenology
2020-02-07 v1 Astrophysics of Galaxies
Other Condensed Matter
General Relativity and Quantum Cosmology
Abstract
We consider a two-component dark matter halo (DMH) of a galaxy containing ultra-light axions (ULA) of different mass. The DMH is described as a Bose-Einstein condensate (BEC) in its ground state. In the mean-field (MF) limit we have derived the integro-differential equations for the spherically symmetrical wave functions of the two DMH components. We studied numerically the radial distribution of the mass density of ULA and constructed the parameters which could be used to distinguish between the two- and one-component DMH. We also discuss an interesting connection between the BEC MF ground state of a one-component DMH and Hawking temperature and entropy of a corresponding Black Hole, and Unruh temperature.
Keywords
Cite
@article{arxiv.2001.10584,
title = {Two-Component Axionic Dark Matter Halos},
author = {Gennady P. Berman and Vyacheslav N. Gorshkov and Vladimir I. Tsifrinovich and Marco Merkli and Vladimir V. Tereshchuk},
journal= {arXiv preprint arXiv:2001.10584},
year = {2020}
}