Main sequence stars with asymmetric dark matter

TL;DR

This paper investigates how asymmetric dark matter particles influence the internal processes of Main Sequence stars in dense dark matter environments, revealing potential new methods to probe dark matter properties.

Contribution

It introduces the impact of feebly or non-annihilating dark matter on stellar cores, providing a novel way to constrain dark matter properties through stellar observations.

Findings

Stars in high dark matter densities show altered core conditions.

Sensitivity to spin-dependent cross-section is achievable at certain densities.

Potential to explore dark matter parameters weakly constrained by direct detection.

Abstract

We study the effects of feebly or non-annihilating weakly interacting Dark Matter (DM) particles on stars that live in DM environments denser than that of our Sun. We find that the energy transport mechanism induced by DM particles can produce unusual conditions in the core of Main Sequence stars, with effects which can potentially be used to probe DM properties. We find that solar mass stars placed in DM densities of rhochi>= e2 GeV/cm3 are sensitive to Spin-Dependent scattering cross-section sigmsd >= e-37 cm2 and a DM particle mass as low as mchi=5 GeV, accessing a parameter range weakly constrained by current direct detection experiments.