Models of charged self-gravitating source in f(R,T) theory

Abstract

We discuss the anisotropic nonstatic charged spherical source describing the phenomena of collapse and expansion in the context of [Formula: see text] theory ([Formula: see text] is the Ricci scalar and [Formula: see text] is the trace of energy–momentum tensor). The Einstein–Maxwell field equations are formulated and an auxiliary solution is considered. We evaluate the corresponding expansion scalar [Formula: see text] and investigate the cases of collapse [Formula: see text] and expansion ([Formula: see text]). In both cases, we explore the influence of charge as well as model parameter on density, radial/tangential pressure, anisotropic parameter and mass through graphs. It is observed that the physical parameters vary with time for expansion while remain constant for collapse. However, the change with respect to the radial coordinate is the same for both cases. The model parameter has the same impact in both cases while charge affects only in the case of collapse. The energy conditions are satisfied for both solutions with particular values of the parameters.