Neutrinos from captured dark matter in galactic stars

TL;DR

This paper explores how neutrinos emitted from dark matter captured in various types of stars near the galactic center could be detected on Earth, offering a new way to probe dark matter in the 200 MeV to 2 GeV mass range.

Contribution

It introduces a novel method of detecting dark matter through neutrino signals from stellar cores, complementing existing direct detection techniques.

Findings

Neutrino flux from stars near the galactic center can be detected by current observatories.

This method probes dark matter masses between 200 MeV and 2 GeV.

The sensitivity compares favorably with existing direct detection bounds.

Abstract

Sub-GeV neutrinos produced in a stellar core may emerge from main sequence stars, white dwarfs and brown dwarfs producing possible observable signals of dark matter capture. A distribution of these stars near the Milky Way galactic center will produce a neutrino flux that can be probed at Earth based neutrino observatories like Super-Kamiokande and Hyper-Kamiokande. We demonstrate that this can provide a handle to probe dark matter masses in the $200\,$MeV\,$-$\,$2\,$GeV mass scales that compares favourably with present day direct detection bounds.