Models of Anisotropic Stars in Spherically Symmetric Space-Time

IF 1.2 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Gravitation and Cosmology Pub Date : 2023-11-23 DOI:10.1134/S0202289323040126

Ankita Jangid, B. S. Ratanpal, K. K. Venkataratnam

引用次数: 0

Abstract

We introduce a new, well-mannered and stable model. To create the model, we used well-known Finch–Skea [1] ansatz for the metric potential \(g_{rr}\). For our model, we look into a number of physical variables, including the energy density, pressures, mass, anisotropy factor, gravitational redshifts, energy conditions, and stability analysis by utilizing graphs. This made sure that our suggested solutions behave as expected and represent physically plausible models for anisotropic matter distributions. We consider compact stars to compare our model with observational data: SAX J1808.4-3658, Her X-1, 4U 1608-52, PSR B1913 \(+\) 16, Cen X-3, LMC X-4, PSR J1614-2230, 4U1538-52, PSR J1903 \(+\) 327, SMC X-1, 4U 1820-30, Vela X-1.

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球对称时空中各向异性恒星模型

我们引进了一种新的、礼貌的、稳定的模式。为了创建模型，我们使用了著名的Finch-Skea [1] ansatz来表示度量势\(g_{rr}\)。对于我们的模型，我们研究了许多物理变量，包括能量密度、压力、质量、各向异性因子、引力红移、能量条件和稳定性分析。这确保了我们建议的解决方案的行为符合预期，并代表了物理上合理的各向异性物质分布模型。我们考虑了致密恒星，将我们的模型与观测数据进行比较:SAX j18084 -3658、Her X-1、4U 1608-52、PSR B1913 \(+\) 16、Cen X-3、LMC X-4、PSR J1614-2230、4U1538-52、PSR J1903 \(+\) 327、SMC X-1、4U 1820-30、Vela X-1。

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来源期刊

Gravitation and Cosmology ASTRONOMY & ASTROPHYSICS-

CiteScore

1.70

自引率

22.20%

发文量

审稿时长

>12 weeks

期刊介绍： Gravitation and Cosmology is a peer-reviewed periodical, dealing with the full range of topics of gravitational physics and relativistic cosmology and published under the auspices of the Russian Gravitation Society and Peoplesâ€™ Friendship University of Russia. The journal publishes research papers, review articles and brief communications on the following fields: theoretical (classical and quantum) gravitation; relativistic astrophysics and cosmology, exact solutions and modern mathematical methods in gravitation and cosmology, including Lie groups, geometry and topology; unification theories including gravitation; fundamental physical constants and their possible variations; fundamental gravity experiments on Earth and in space; related topics. It also publishes selected old papers which have not lost their topicality but were previously published only in Russian and were not available to the worldwide research community

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