A Lower Bound on the Mass of Compact Objects from Dissipative Dark Matter

Gurian, James and Ryan, Michael and Schon, Sarah and Jeong, Donghui and Shandera, Sarah (2022) A Lower Bound on the Mass of Compact Objects from Dissipative Dark Matter. The Astrophysical Journal Letters, 939 (1). L12. ISSN 2041-8205

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We study the fragmentation scale of dark gas 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 thermochemical 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. The results indicate that much of the parameter space is highly unstable to small-scale fragmentation.

Item Type: Article
Subjects: Eprints AP open Archive > Physics and Astronomy
Depositing User: Unnamed user with email admin@eprints.apopenarchive.com
Date Deposited: 10 May 2023 10:28
Last Modified: 16 Sep 2023 06:12
URI: http://asian.go4sending.com/id/eprint/175

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