Charged anisotropic pulsar SAX J1748.9-2021 in non-Riemannian geometry

IF 2.5 3区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS

Nuclear Physics B Pub Date : 2025-04-09 DOI:10.1016/j.nuclphysb.2025.116896

M. Sharif , Iqra Ibrar

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引用次数: 0

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 (Q, T)

theory, where

Q

and

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, 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.

查看原文本刊更多论文

非黎曼几何中的带电各向异性脉冲星SAX J1748.9-2021

本文在f（Q，T）理论背景下研究电荷对脉冲星SAX J1748.9-2021稳定性的影响，其中Q和T分别代表非度规标量和能量动量张量。为了实现这一目标，我们采用了各向异性流体的Krori-Barua度量分析。我们得到了相应场方程的精确相对论解。此外，我们通过对脉冲星SAX J1748.9-2021的天体物理观测，研究了它的物理和几何特性。该方法为连接流体参数、各向异性、质量半径关系、紧致度、红移、能量、Zeldovich和因果条件、状态参数方程、绝热指数和Tolman-Oppenheimer-Volkoff方程等物理量提供了基础。我们的发现与观测证据一致，表明脉冲星SAX J1748.9-2021在这一修正理论下仍然是可行和稳定的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Physics B 物理-物理：粒子与场物理

CiteScore

5.50

自引率

7.10%

发文量

302

审稿时长

1 months

期刊介绍： Nuclear Physics B focuses on the domain of high energy physics, quantum field theory, statistical systems, and mathematical physics, and includes four main sections: high energy physics - phenomenology, high energy physics - theory, high energy physics - experiment, and quantum field theory, statistical systems, and mathematical physics. The emphasis is on original research papers (Frontiers Articles or Full Length Articles), but Review Articles are also welcome.