The impact of asymmetric dark matter on the thermal evolution of nucleonic and hyperonic compact stars

Understand

We investigate the impact of asymmetric fermionic dark matter (DM) on the thermal evolution of neutron stars (NSs), considering a scenario where DM interacts with baryonic matter (BM) through gravity.

• Employing the two-fluid formalism, our analysis reveals that DM accrued within the NS core exerts an inward gravitational pull on the outer layers composed of BM.
• This gravitational interaction results in a noticeable increase in baryonic density within the core of the NS.
• Consequently, it strongly affects the star's thermal evolution by triggering an early onset of the direct Urca (DU) processes, causing an enhanced neutrino emission and rapid star cooling.