On the stability of electrostatics stars with modified non-gauge invariant Einstein-Maxwell gravity

TL;DR

This paper investigates the stability of electrostatic stars within a modified Einstein-Maxwell gravity framework that includes non-gauge invariant correction terms, motivated by cosmic magnetic field effects on universe inflation.

Contribution

It introduces a novel non-gauge invariant Einstein-Maxwell gravity model and applies a dynamical systems approach to analyze star stability under these modifications.

Findings

Stability conditions depend on the interaction terms in the model

Modified gravity influences star stability criteria

Cosmic magnetic field effects are incorporated into stellar stability analysis

Abstract

We use a modified Einstein-Maxwell gravity to study stability of an electrostatic spherical star. Correction terms in this model are scalers which are made from contraction of Ricci tensor and electromagnetic vector potential. Our motivation to use this kind of exotic EM gravity is inevitable influence of cosmic magnetic field in inflation of the universe which is observed now but its intensity suppresses in the usual gauge invariant EM gravity. In this work we use dynamical systems approach to obtain stability conditions of such a star and investigation of affects of interaction parts of the model on the stability.