Speaker
Description
Neutron stars offer a unique opportunity to probe dark matter indirectly under extreme physical conditions that cannot be reproduced in terrestrial experiments. In this talk, I will discuss recent studies of dark matter admixed neutron stars within both two-fluid and single-fluid approaches. In the two-fluid framework, baryonic matter and dark matter are treated as separate gravitationally coupled components, which may lead to the formation of dark cores or extended halos and produce distinct effects on the stellar structure. In the single-fluid approach, dark matter modifies the effective equation of state and consequently alters the global properties of the star in a complementary way. I will show how these scenarios affect observable quantities such as the mass-radius relation, maximum mass, and tidal deformability, and how current multimessenger constraints can be used to restrict the allowed dark matter parameter space. These results highlight the strong potential of neutron stars as astrophysical laboratories for exploring the nature of dark matter.
