各向异性巴丁球在模拟 f(G) 重力下的相对论配置的详细分析

A. Malik, Ayesha Almas, T. Naz, Rubab Manzoor, M. Z. Bhatti
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摘要

本研究的目的是在 f(G) 修正万有引力理论框架内研究各向异性紧凑物体的物理特征。在我们目前的工作中,爱因斯坦-麦克斯韦方程在电荷印象下定义,利用 Krori-Barua 度量,即 λ(r) = Xr2 + Y 和 β(r) = Zr2,由球面对称时空描述。为了达到预期目标,我们使用内部时空和外部时空的比较方法计算恒星辩论中使用的未定义约束条件,同时将巴丁几何视为外部时空。此外,为了通过假设可行的 f(G) 模型(包括对数修正)来分析巴丁紧凑恒星的恒星构型,我们分别建立了一些用于检验压力和密度成分的表达式。我们讨论了能量条件,以验证我们的模型在各种候选恒星中的可行性。我们还研究了其他一些物理特征,如平衡条件、状态方程参数、绝热指数、稳定性分析、质量函数、表面红移和紧凑系数。最后,所有结果都表明,所考虑的系统在物理上是稳定的,没有奇点,是可行的。关键词巴丁紧凑星、f(G) 修正引力、克罗里-巴鲁阿势。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Detailed Analysis of Relativistic Confi guration of Bardeen Anisotropic Spheres inModi fied f(G) Gravity
The objective of present work is to deal with physical features of anisotropic compact objects within the framework of f(G) modified theory of gravity. For our present work, the Einstein- Maxwell equations defined under the impression of charge by utilizing the Krori-Barua metric i.e, λ(r) = Xr2 + Y and β(r) = Zr2, described by spherically symmetric space-time. To accomplish the desired objective, we calculate the undefined constrains utilized within the stellar debate by using the comparison method of interior and exterior spacetime while Bardeen geometry consider as an exterior. Further, to analyze the stellar configuration of Bardeen compact stars by assuming viable f(G) models including logarithmic corrected, we establish some expressions for examining the components of pressure and density, respectively. We address the energy conditions to verify our model’s viability for the various star candidates. Some other physical features, such as equilibrium condition, equation of state parameters, adiabatic index, stability analysis, mass function, surface Redshift and compactness factor, have been investigated. Conclusively, all the obtained results shows that the system under consideration is physically stable, free from singularity, and viable. Keywords: Bardeen compact stars, f(G) modified gravity, Krori-Barua potential.
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