PREPRINT
D3384BE1-9768-4496-98AE-7B147D468909

The Minimum Mass of Compact Objects from Dissipative Dark Matter

James Gurian, Michael Ryan, Sarah Schon, Donghui Jeong, Sarah Shandera
arXiv:2209.00064

Submitted on 31 August 2022

Abstract

We study the minimum mass of dark compact objects formed in dissipative dark-matter halos and show that the simple atomic-dark-matter model consistent with all current observations can create low-mass fragments that can evolve into compact objects forbidden by stellar astrophysics. We model the collapse of the dark halo's dense core by tracing the thermo-chemical evolution of a uniform-density volume element under two extreme assumptions for density evolution: hydrostatic equilibrium and pressure-free collapse. We then compute the opacity-limited minimum fragment mass from the minimum temperature achieved in these calculations.

Preprint

Comment: 6 pages, 3 figures

Subject: Astrophysics - Cosmology and Nongalactic Astrophysics

URL: https://arxiv.org/abs/2209.00064