Three-layered relativistic stellar model endowed with distinct equation of states

Abstract

In this paper, we amalgamate three-layer hypothesis of compact star models given by Ginzburg (Usp Fiz Nauk 103:393, 1971) with our recent works on core-envelope compact star models (Gedela et al. in Eur Phys J C 79:566, 2019; Pant et al. in Eur Phys J C 79:602, 2019) and propose a three-layered relativistic stellar model endowed with distinct equation of states (EoSs) in the realm of general relativity. Instead of considering core and envelope of a neutron star, we insert an extra layer, namely, an intermediate layer in between the core and envelope to enhance a new conceptual aspect of realistic and accurate modeling of internal structure of stellar objects. The quark core is assumed to satisfy MIT-bag EoS, an intermediate region and a thin envelope of matter are considered with modified Bose–Einstein condensate (BEC) and quadratic EoSs, respectively. Further, respective pairs of interfaces in between stellar objects are matched with Dormois–Israel conditions. We verify almost all physical and geometrical parameters, including anisotropic, radial pressure, compactification factor, energy conditions, and stability conditions using TOV equation are with viable trends and continuous with the smooth variations throughout interior of the stars.