A Lower Bound on the Mass of Compact Objects from Dissipative Dark Matter
| Autor: | James Gurian, Michael Ryan, Sarah Schon, Donghui Jeong, Sarah Shandera |
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| Rok vydání: | 2022 |
| Předmět: | |
| DOI: | 10.48550/arxiv.2209.00064 |
| Popis: | 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. Comment: 6 pages, 3 figures. Updated figures to reflect a corrected H2 dissociation rate in DarkKROME |
| Databáze: | OpenAIRE |
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