Anisotropic Maxwell ultracompact star in modified gravity

Abstract

In this article, we have developed an analytical version of charged gravastar model with non-uniform anisotropic feature in the framework of f ( R , T ) theory. In order to introduce anisotropy in the system, we considered gravitational decoupling by means of Minimal Geometric Deformation (MGD). In the interior region, we obtained a family of interior solutions which smoothly joins a conformally deformed Reissner–Nordström exterior solution as well as standard Reissner–Nordström solution at the stellar boundary R = a ( τ ) , being τ as proper time. In both cases, we have different ranges of λ for the smooth joint at the stellar boundary. The ultracompact interior solution representing a family of charged stellar models satisfies some of the fundamental properties of a stable configuration, which includes regularity at the center, positive energy density with monotonically decreasing behavior from the center outwards, and non-uniform pressure with monotonic profile. All the energy bounds except the strong one are satisfied inside the ultracompact interior for all the values of λ , compatible with regularity condition.