Impact of a variable cosmological constant on stellar matter configurations in Finch-Skea spacetime

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Astrophysics and Space Science Pub Date : 2025-05-14 DOI:10.1007/s10509-025-04435-6

M. Ilyas, Maha, Salma Nawaz, Falak Sher, Fawad Khan

引用次数: 0

Abstract

In this study, a variable cosmological constant model is created for anisotropic star structures, which satisfies the remaining physical requirements, and validates the required energy conditions (Ecs), and TOV equations. First, the Finch-Skea spacetime solution is taken into account as a static spherically symmetric metric. Moreover, external Schwarzschild geometry is taken into account to correlate our internal stellar structure and determine the values of the constants used in the Finch-Skea spacetime solution. Finally, in this paper, multiple aspects are discussed, such as the radius, compactness, stresses, stability, density profile, and masses under the variable cosmological constant model in \(f(R,T)\) gravity for various stars.

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芬奇-斯基时空中可变宇宙常数对恒星物质构型的影响

本研究建立了各向异性恒星结构的变宇宙学常数模型，该模型满足了剩余的物理要求，并验证了所需的能量条件（Ecs）和TOV方程。首先，将Finch-Skea时空解视为静态球对称度量。此外，考虑到外部史瓦西几何来关联我们的内部恒星结构，并确定Finch-Skea时空解中使用的常数值。最后，本文讨论了不同恒星在变宇宙学常数模型\(f(R,T)\)引力下的半径、紧致度、应力、稳定性、密度分布和质量等多个方面。

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

Astrophysics and Space Science 地学天文-天文与天体物理

CiteScore

3.40

自引率

5.30%

发文量

106

审稿时长

2-4 weeks

期刊介绍： Astrophysics and Space Science publishes original contributions and invited reviews covering the entire range of astronomy, astrophysics, astrophysical cosmology, planetary and space science and the astrophysical aspects of astrobiology. This includes both observational and theoretical research, the techniques of astronomical instrumentation and data analysis and astronomical space instrumentation. We particularly welcome papers in the general fields of high-energy astrophysics, astrophysical and astrochemical studies of the interstellar medium including star formation, planetary astrophysics, the formation and evolution of galaxies and the evolution of large scale structure in the Universe. Papers in mathematical physics or in general relativity which do not establish clear astrophysical applications will no longer be considered. The journal also publishes topically selected special issues in research fields of particular scientific interest. These consist of both invited reviews and original research papers. Conference proceedings will not be considered. All papers published in the journal are subject to thorough and strict peer-reviewing. Astrophysics and Space Science features short publication times after acceptance and colour printing free of charge.