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Impact of Rastall Gravity on PSR J0348+0432 Hybrid Star with Strange Quark Matter
Sunaiha Naeem and Arfa Waseem
Abstract:
This paper presents the investigation of isotropic compact stars in Rastall gravity theory focusing on the influence of the Rastall parameter on the stability and structure of compact stellar model PSR J0348+0432. The interior geometry is modeled by the Durgapal-Fuloria metric. The compact star is assumed to be a perfect fluid in a static, spherically symmetric spacetime. The star’s matter distribution is modeled as a two-component system consisting of ordinary baryonic matter and strange quark matter whose quark phase is governed by the MIT bag model equation of state. The model’s unknown parameters are obtained by applying standard junction conditions by matching the interior solution with the exterior solution along with the observed masses and radii of the compact stellar candidates. The obtained solutions are subjected to tests on the matter variables, energy conditions, equation of state, mass function, and restrictions on the parameters of stability and the Rastall parameter to check the physical viability of the solutions. The stellar configurations constructed in this paper are stable, well behave and physically realistic in the scenario of Rastall gravity which supports the viability of Rastall gravity theory as an alternative theory to model realistic compact stars.
Keywords:
Rastall theory; Compact stars; Durgapal-Fuloria metric; MIT Bag model; Stability analysis.
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