Exploring structure and stability of charged gravastar in non-conservative theory of gravity

Abstract This study examines the effect of charge on physical features of a gravastar model in the framework of Rastall gravity. A gravastar is an alternative model to a black hole consisting of three separate regions: the inner sector, the intermediate shell and the outer sector. Different values of the barotropic equation of state (EoS) parameter provide the mathematical basis for these regions. Field equations (FEs) are initially developed for a spherically symmetric spacetime coupled with charged matter distribution. We then use the temporal component of Tolman IV spacetime to formulate the radial metric potential for both the inner region and intermediate shell. We also apply the matching criteria to ensure smooth matching of exterior and interior spacetimes so that the constants resulting from integrations can be determined. Afterwards, we explore various physical properties of the developed gravastar model such as the proper length, entropy, energy, and others to analyze how shell thickness and charge affect them. It is concluded that, in the background of Rastall theory, a gravastar model exists and serves as a viable alternative to the black hole.