Gravothermal Pile-Up of Collisional Dark Matter Around Compact Objects
arXiv:2507.11601
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.
arXiv comment22 pages, 9 figures, journal version