Physical analysis of anisotropic compact stars in f(𝒬) gravity

IF 1.5 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Modern Physics Letters A Pub Date : 2023-11-10 DOI:10.1142/s0217732323501523
Muhammad Adeel, M. Zeeshan Gul, Shamaila Rani, Abdul Jawad
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Abstract

The main objective of this study is to investigate the stability and viability of anisotropic compact stellar objects using the Krori–Burua solutions in [Formula: see text] gravity, where [Formula: see text] is a nonmetricity scalar that explains the gravitational effects. We use a static spherical metric in the inner region and Schwarzschild spacetime in the outer region of the Her X-I, SAX J 1808.4-3658 and 4U1820-30 compact stars to investigate their physical properties. By using observed values of the radius and mass of the considered compact stars, the unknown parameters are determined. We use a particular model of this theory to examine the behavior of energy density, pressure components, anisotropy, equation of state parameters and energy constraints in the interior of the proposed stellar objects. The Tolman–Oppenheimer–Volkoff equation is used to analyze the equilibrium state of these stars and causality condition, Herrera cracking method, adiabatic index methods are used to determine their stability. It is found that revolutionary technique sheds new light on the development of observationally accurate gravity model.
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f(𝒬)重力下各向异性致密星的物理分析
本研究的主要目的是研究各向异性致密恒星物体的稳定性和生存能力,使用[公式:见文本]引力中的Krori-Burua解,其中[公式:见文本]是一个解释引力效应的非度量标量。我们在Her x - 1、SAX J 1808.4-3658和4U1820-30致密恒星的内部区域和外部区域使用静态球度规和史瓦西时空来研究它们的物理性质。利用所考虑的致密恒星的半径和质量的观测值,确定了未知参数。我们使用该理论的一个特定模型来检查所提出的恒星物体内部的能量密度、压力分量、各向异性、状态方程参数和能量约束的行为。用Tolman-Oppenheimer-Volkoff方程分析了这些恒星的平衡状态和因果关系条件,用Herrera裂解法、绝热指数法确定了它们的稳定性。这一革命性的技术为建立精确观测的重力模型提供了新的思路。
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来源期刊
Modern Physics Letters A
Modern Physics Letters A 物理-物理:核物理
CiteScore
3.10
自引率
7.10%
发文量
186
审稿时长
3 months
期刊介绍: This letters journal, launched in 1986, consists of research papers covering current research developments in Gravitation, Cosmology, Astrophysics, Nuclear Physics, Particles and Fields, Accelerator physics, and Quantum Information. A Brief Review section has also been initiated with the purpose of publishing short reports on the latest experimental findings and urgent new theoretical developments.
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