Prediction of mass and radii of anisotropic polytropic compact objects with Buchdahl-I metric

IF 4.8 2区物理与天体物理 Q2 PHYSICS, PARTICLES & FIELDS The European Physical Journal C Pub Date : 2025-02-04 DOI:10.1140/epjc/s10052-025-13871-1

S. A. Mardan, A. Zahra, Muhammad Bilal Riaz, Rubab Manzoor, Adnan Malik

引用次数: 0

Abstract

In this article, we discuss several compact objects (GW 190814, PSR J0952-0607, PSR J0030+0451, PSR J0740+6620, GW 170817, PSR J1614-2230, PSR J2215+5135, and 4U 1608-52) to predict their masses and radii. A generalized polytropic stellar model within the framework of general relativity is derived by employing the Buchdahl-I metric. All the physical quantities such as energy density, radial, and tangential pressure are well behaved, continuous and no singularity is observed. The obtained results are compatible with observational data for compact objects under consideration. The physical stability of this model is determined by using generalized hydrostatic equilibrium condition, energy conditions, causality conditions and Herrera’s cracking technique. We observe that our model fulfills all of the requirements for being a physically realistic model.

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用Buchdahl-I度规预测各向异性多向致密物体的质量和半径

在本文中，我们讨论了几个紧凑的天体（GW 190814, PSR J0952-0607, PSR J0030+0451, PSR J0740+6620, GW 170817, PSR J1614-2230, PSR J2215+5135, 4U 1608-52）来预测它们的质量和半径。利用布赫达尔- 1度规导出了广义相对论框架内的广义多向性恒星模型。所有物理量如能量密度、径向压力和切向压力都表现良好，连续且无奇点。所得结果与所考虑的致密天体的观测数据一致。采用广义流体静力平衡条件、能量条件、因果关系条件和Herrera裂化技术确定了模型的物理稳定性。我们观察到我们的模型满足了作为一个物理现实模型的所有要求。

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

The European Physical Journal C 物理-物理：粒子与场物理

CiteScore

8.10

自引率

15.90%

发文量

1008

审稿时长

2-4 weeks

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