The effect of neutron matter equation of state on the distribution of dark matter in neutron star

Document Type : Full length research Paper

Abstract

In this paper, we investigate the effect of neutron matter equation of state on the structure of halo of dark matter and the distribution of dark matter in neutron star using the relativistic two-fluid formalism in the dark-matter admixed neutron star. Applying the equation of state related to the free fermionic gas as dark matter equation of state, we calculate the structure of dark-matter admixed neutron star within different models of Skyrme interaction for the neutron matter, SLy230a, SLy230b, SkM*. Our results indicate that the mass-radius relation depends on the model of interaction. In addition, our calculations confirm that the neutron matter equation of state affects the size of dark matter and neutron matter cores. The results show that the surface gravitational redshift depends on the neutron matter equation of state.

Keywords


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