Constraining Asymmetric DM Properties by Black Hole Formation in Neutron Stars and Population III Stars

2024/12/10 by Diks, Jared, Ilie, Cosmin
#Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2412.07953

Abstract

In this work we explore the potential for Neutron Stars (NSs) at the Galactic center and Population~III stars to constrain bosonic Asymmetric Dark Matter (ADM). We demonstrate that for NSs in an environment of sufficiently high DM density (ρ_χ\gtrsim10⁹GeV/cm³), the effects of both multiscatter capture and DM evaporation cannot be neglected. Conversely, for Pop~III stars, we find they are excellent at probing low-mass ADM. For instance, the most easily observable Population III stars could be highly effective at constraining high-σ low-m_χ DM, maintaining efficacy below m_χ=10^-15GeV (assuming a Bose Einstein Condensate(BEC) forms) thanks to their far lower value of m_χ at which capture saturates to the geometric limit. Finally, we derive closed-form approximations for the evaporation rate of DM from arbitrary polytropic objects and from DM particles in a BEC state.

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