Astrophysical signatures of charged gravastar model in Rastall gravity admitting conformal motion

In this study, we develop a model of spherically symmetric stellar system known as gravastar under Rastall gravity theory, incorporating an isotropic fluid source and an electromagnetic field. We develop the modified Einstein–Maxwell field equations in the considered non-conserved gravity and employ conformal Killing vectors that link geometry and matter through inherited symmetries. By applying this approach alongside a linear equation of state, we determine the metric potentials that govern the geometry of a gravitationally vacuum star. Further, we conduct a graphical analysis of several features to enhance the significance of our findings, including proper length, energy, entropy, equation of state parameters, matching conditions, and stability indicators like surface redshift and the adiabatic index. We also smoothly align our model’s internal spacetime with the external Reissner–Nordström spacetime to find matter variables on the spherical surface. Our results suggest that the Rastall theory, when merged with the conformal symmetry, produces a gravastar model that is physically consistent and could exhibit unique characteristics distinct from black holes under certain parametric values.

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