Charged Anisotropic Pulsar SAX J1748.9-2021 in Non-Riemannian Geometry

TL;DR

This study explores how charge influences the stability of the pulsar SAX J1748.9-2021 within a non-Riemannian geometric framework, providing exact solutions and aligning with observational data.

Contribution

It introduces exact relativistic solutions for charged anisotropic pulsars in $f( ext{Q}, ext{T})$ gravity, connecting physical quantities with observational evidence.

Findings

Pulsar remains stable under the modified gravity model.

Physical parameters are consistent with astrophysical observations.

The model supports the feasibility of charged anisotropic pulsars in non-Riemannian geometry.

Abstract

In this paper, we investigate the impact of charge on the stability of the pulsar star SAX J1748.9-2021 within the context of $f(\mathbb{Q}, \mathcal{T})$ theory, where $\mathbb{Q}$ and $\mathcal{T}$ represent the non-metricity scalar and the energy-momentum tensor, respectively. To achieve this, we employ the Krori-Barua metric ansatz with anisotropic fluid. We obtain exact relativistic solutions for the corresponding field equations. Additionally, we examine its physical and geometric properties using astrophysical observations of the pulsar SAX J1748.9-2021. This approach provides a basis for connecting several physical quantities, including fluid parameters, anisotropy, mass-radius relationship, compactness, redshift, \emph{energy}, the Zeldovich and causality conditions, equation of state parameter, adiabatic index and the Tolman-Oppenheimer-Volkoff equation. Our findings align with observational evidence, indicating that the pulsar SAX J1748.9-2021 remains both feasible and stable under this modified theory.