Anisotropic compact star: various equations of state

IF 1.9 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Pramana Pub Date : 2025-05-16 DOI:10.1007/s12043-025-02918-3

Rinkal Patel, B S Ratanpal

引用次数: 0

Abstract

We develop models of compact stars with pressure anisotropy on Finch–Skea space–time by applying a generalised equation of state (EoS), which includes specific cases such as linear, quadratic, polytropic, Chaplygin, and colour-flavour-locked (CFL) equations of state. The physical viability of these models is tested for the strange star candidate 4U 1820-30, with a mass \( M = 1.58M_\odot \) and radius \(R = 9.1\) km. All models are found to be physically plausible.

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各向异性致密星：各种状态方程

我们通过应用广义状态方程（EoS）建立了在Finch-Skea时空中具有压力各向异性的致密恒星模型，该模型包括线性、二次、多向、Chaplygin和色味锁定（CFL）状态方程等具体情况。这些模型的物理可行性在质量为\( M = 1.58M_\odot \)，半径为\(R = 9.1\)公里的奇怪候选恒星4U 1820-30上进行了测试。所有的模型在物理上都是可信的。

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

Pramana 物理-物理：综合

CiteScore

3.60

自引率

7.10%

发文量

206

审稿时长

3 months

期刊介绍： Pramana - Journal of Physics is a monthly research journal in English published by the Indian Academy of Sciences in collaboration with Indian National Science Academy and Indian Physics Association. The journal publishes refereed papers covering current research in Physics, both original contributions - research papers, brief reports or rapid communications - and invited reviews. Pramana also publishes special issues devoted to advances in specific areas of Physics and proceedings of select high quality conferences.