Neutron star as laboratories for Cosmology

TL;DR

Neutron stars serve as natural laboratories for cosmology, enabling the study of dark matter interactions and potential deviations in fundamental constants through their extreme densities and gravitational effects.

Contribution

This paper highlights the potential of neutron stars to probe dark matter properties and fundamental constant deviations, offering new observational avenues in cosmology.

Findings

Neutron stars can accrete dark matter from the galactic halo.

Self-annihilation of dark matter in neutron stars may produce observable signals.

High-density interiors of neutron stars can test deviations of fundamental constants.

Abstract

Neutron stars can be considered a useful and interesting laboratory for Cosmology. With their deep gravitational potential they may accrete dark matter from the galactic halo and subsequent self-annihilation processes could induce an indirect observable signal this type of matter. In addition, the large densities in the interior of these objects may constitute a test-bench to study hypothesized deviations of fundamental constant values complementary to existing works using constraints at low density from BBN.