具有线性状态方程（EOS）的各向异性恒星

IF 1.6 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Indian Journal of Physics Pub Date : 2024-08-06 DOI:10.1007/s12648-024-03297-y

Rinkal Patel, B. S. Ratanpal, Ranjan Sharma

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引用次数: 0

摘要

研究考虑了一种新形式的状态方程（EOS），以建立一个描述静态、球面对称、紧凑的各向异性恒星内部的模型。解析解是利用芬奇和斯基亚方差的度量势 \(g_{rr},\)得到的，并对相关背景时空进行了独特的几何解释。模型参数是通过将内部解与恒星边界上的施瓦兹柴尔德外部度量相匹配来固定的，同时要求径向压力在边界处消失。利用脉冲星 4U1802030 的现有数据分析了所建立模型的物理可行性。结果表明该模型是稳定的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Anisotropic star with a linear equation of state (EOS)

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Anisotropic star with a linear equation of state (EOS)

A new form of the equation of state (EOS) is considered to develop a model for describing the interior of a static, spherically symmetric, compact anisotropic star. The analytic solution is obtained using the Finch and Skea ansatz for the metric potential \(g_{rr},\) with a distinct geometric interpretation for the related background spacetime. The model parameters are fixed by matching the interior solution to the Schwarzschild exterior metric over the boundary of the star, together with the requirement that the radial pressure vanishes at the boundary. Data available for the pulsar 4U1802030 has been utilized to analyze the physical viability of the developed model. The model is shown to be stable.

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来源期刊

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.