Neutron Star The Cooling of Dark-Matter-Admixed Neutron Stars with Antikaon Condensations

We investigate the cooling properties of dark-matter-admixed neutron stars (NSs) with antikaon (including [Formula: see text] and [Formula: see text]) condensations. Dark matter (DM) is assumed to be made of non-self annihilating, but weakly self-interacting fermions. Results show that the neutrino luminosity of NSs dependence strongly on the neutron star mass, and antikaon condensations decrease it for any DM particle mass significantly. DM improves the cooling rate of high-mass NSs but reduces it for low-mass NSs, whereas antikaon condensations depress the cooling of NSs with medium and low masses. Overall, the effects of DM and antikaon condensations on NS cooling are mutually suppressive.