Speaker
Description
In this study, we consider different features induced by the presence of dark matter (DM) in a new type of compact object so-called DM admixed neutron star (NS), in light of the latest observational data of NICER X-ray telescope and LIGO/Virgo Gravitational-Wave (GW) detectors. We investigate self-repulsive sub-GeV bosonic DM which can be distributed as a core inside the NS or as an extended halo around it altering the NSs' observable quantities. Regarding astrophysical constraints of maximum mass, radius and tidal deformability, we probe the bosonic DM parameter space and its fraction within the mixed object. Taking a wide range of bosonic particle mass, self-coupling constant and its fraction, and considering the fact that DM core/halo formation might disapprove the limits of maximum mass, radius and tidal deformability, stringent constraints have been obtained for the DM parameters. Finally, as a novel probe to explore the DM halo formation around NSs by X-ray telescopes, the pulse profile modeling of X-ray pulsars is applied in our investigation. It is seen that depending on the compactness of the mixed object, minimum fluxes of the pulse profiles would be altered significantly.
