类时间保角施瓦兹柴尔德黑洞的测地偏差分析

IF 1.6 4区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Indian Journal of Physics Pub Date : 2024-07-24 DOI:10.1007/s12648-024-03341-x
Muhammad Saad Ghafar, Farhad Ali, Zahir Shah, Shahid Iqbal, Mansoor H. Alshehri
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引用次数: 0

摘要

天体物理现象,例如黑洞(BHs)的生长或衰变、引力波可能会不断改变时空曲率。此外,这些现象还会随着时间的推移影响源的热力学结构。在这项研究中,我们考察了在不违反对称结构的情况下,在正则化群改进(RGI)施瓦兹柴尔德BH中插入时间共形因子(e^{\epsilon f(t)}\)。我们证明了负责时间保角重正化群改进施瓦兹柴尔德(TCRGIS)BH 周围时空结构的曲率不变式明确依赖于这个时间保角因子。在这些不变式中出现的参数(\(\gamma\))给出了利玛窦张量、利玛窦标量和克雷奇曼标量平方的完整径向轮廓。对于\(\gamma\)的正值,TCRGIS-BH的曲率行为与RGI-BH和Schwarzschild BH相似,因为它在\(\gamma =0\)的中心处变得无限大。此外,我们还分析出,与RGI Schwarzschild BH和常规Schwarzschild BH相比,TCRGIS BH的曲率不变性随时间的变化下降得更快。
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Geodesic deviation analysis of time conformal Schwarzschild like black hole

The astrophysical phenomena, for instance, the growth or decay of black holes (BHs), gravitational waves may continuously change the curvature of spacetimes. In addition, such phenomena also affect the thermodynamic structure of the sources over time. In this research, we examined the insertion of the time conformal factor \(e^{\epsilon f(t)}\) in the Renormalization Group Improved (RGI) Schwarzschild BH, without violating symmetry structure. We demonstrated that the curvature invariants, which are responsible for the spacetime structure around the time conformal Renormalization Group Improved Schwarzschild (TCRGIS) BH, depend explicitly on this time conformal factor. The parameter \(\gamma\) that appeared in these invariants gives a complete radial profile of the square of the Ricci tensor, the Ricci scalar and the Kretschmann scalar. For positive values of \(\gamma\) the behavior of the curvature of TCRGIS-BH is similar to both the RGI-BH and the Schwarzschild BH as it becomes infinite at center for \(\gamma =0\). Moreover, we have analyzed that the curvature invariants for TCRGIS BH decrease more rapidly as compared to both the RGI Schwarzschild BH and regular Schwarzschild BH, as a function of time.

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来源期刊
Indian Journal of Physics
Indian Journal of Physics 物理-物理:综合
CiteScore
3.40
自引率
10.00%
发文量
275
审稿时长
3-8 weeks
期刊介绍: Indian Journal of Physics is a monthly research journal in English published by the Indian Association for the Cultivation of Sciences in collaboration with the Indian Physical Society. The journal publishes refereed papers covering current research in Physics in the following category: Astrophysics, Atmospheric and Space physics; Atomic & Molecular Physics; Biophysics; Condensed Matter & Materials Physics; General & Interdisciplinary Physics; Nonlinear dynamics & Complex Systems; Nuclear Physics; Optics and Spectroscopy; Particle Physics; Plasma Physics; Relativity & Cosmology; Statistical Physics.
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