Model of compact star with ordinary and dark matter

Abstract

We study compact stars formed by dark and ordinary matter, with attributes of both neutron star matter and quark star matter. We assume an equation of state for dark matter which is consistent with the rotational curves of galaxies and for color-flavor-locked (CFL) distributions for ordinary matter. This is done in the curved Krori-Barua spacetime geometry in general relativity. We find new exact solutions of dark matter admixed compact objects, with maximum mass 2.67 M and radius around 11.16 km, with 52.40% of dark matter content. By varying the dark matter ratio, we obtain the masses of dark compact stars with masses less than 2.67 M . Keywords Einstein equations • Compact stars • Equation of state 1 IntroductionA quark star is made up of self-bound strange quark matter and its also known as a hypothetical stellar object (see

PossibleExistence of Dark-Matter-Admixed Pulsar in the Disk Region of the Milky Way Galaxy

“…Few astrophysicists [60,63,65,66,[68][69][70][71][72] have worked on dark-matter-admixed pulsars. We have investigated the existence of dark-matter-admixed pulsar in the galactic halo region of the galaxy .…”

“…Some astrophysicists [60,63,65,66,[68][69][70][71][72] have worked on the dark matter neutron star. Inspired by their work, we have investigated [73] the existence of dark matter in pulsars by using the singular isothermal sphere (SIS) density profile.…”

A relativistic appearance of hotspots on an ultra-compact dark star

“…The coexistence of dark energy and ordinary matter suggests that existing stars may consist of a combination of both substances in varying proportions. Recently, realistic models of massive compact objects, including neutron and strange stars composed of high-density fluid and dark energy modeled by a scalar field interacting with matter, have been developed [1,2,3,4,5]. Some compact stars with dark energy, proposed in [6], are among the most ultra-compact objects in the universe.…”