Gravothermal Pile-Up of Collisional Dark Matter Around Compact Objects
High Energy Physics - Phenomenology
2026-02-18 v2 Cosmology and Nongalactic Astrophysics
Astrophysics of Galaxies
General Relativity and Quantum Cosmology
Abstract
The dark matter may consist of multiple species that interact differently. We show that a species that is cosmologically subdominant but highly collisional can pile up and become dominant in deep gravitational wells, such as those of white dwarfs and neutron stars.
Keywords
Cite
@article{arxiv.2507.11601,
title = {Gravothermal Pile-Up of Collisional Dark Matter Around Compact Objects},
author = {Reza Ebadi and Erwin H. Tanin},
journal= {arXiv preprint arXiv:2507.11601},
year = {2026}
}
Comments
22 pages, 9 figures, journal version