Charged stellar structure in f(R,ϕ) gravity admitting Chaplygin equation of state

Abstract

The aim of this paper is to examine the singularity-free solutions for anisotropic stellar structures in [Formula: see text] theory of gravity, where [Formula: see text] denotes the Ricci scalar and [Formula: see text] represents the scalar field. For this purpose, we consider the spherically symmetric spacetime to discuss the stellar structures with anisotropic fluid. Moreover, the Einstein field equations are solved by using Chaplygin equation of state, and the Karori–Barua metric. To analyze the charged stellar structure, we use the matching conditions of spherically symmetric spacetime with the Reissner–Nordstrom exterior metric and develop some expressions for finding the unknown parameters. We further investigate the graphical behavior of energy density, pressure components, anisotropic component, equation of state parameters, equilibrium condition, stability analysis, adiabatic index and energy conditions. Conclusively, our considered stellar structures under observations are realistic, stable, and are free from any singularities.