具有规定形式度量势 $$g_{rr}$$ 的各向异性奇异星的一些新模型

IF 1.6 4区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Indian Journal of Physics Pub Date : 2024-06-02 DOI:10.1007/s12648-024-03252-x
R. Tamta, P. Fuloria, P. Tamta
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引用次数: 0

摘要

在本文中,我们利用一种新形式的度量势生成了各向异性奇异星模型。我们通过假设一个合适的各向异性函数形式来确定另一个度量系数,从而使两者都不存在任何奇异性。我们广泛分析了紧凑星 SMC X-4、LMC X-4 的热力学物理变量和几何特征。所有变量的趋势都定义明确,在物理上是可以接受的。恒星SMCX-4和LMCX-4的质量和半径与现有已知参数非常吻合。内部时空度量将与施瓦兹柴尔德真空解相匹配,以确定常数参数。绝热指数呈现出物理上合理的趋势,在整个紧凑流体球内部都超过了 4/3。通过埃雷拉裂缝概念和哈里森-泽尔多维奇-诺维科夫准则分析了恒星模型的稳定性。所提出的恒星模型很好地遵守了因果关系条件。流体球体平衡的 TOV 方程在恒星模型中得到了很好的维持。
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Some new models for anisotropic strange star with a prescribed form of metric potential $$g_{rr}$$

In this paper, we generate the anisotropic strange star models using a new form of metric potential. We determine the another metric coefficient by assuming a suitable form of anisotropy function, in such a way that both are free from any kind of singularities. We analyze the thermodynamic physical variables and geometric features extensively for the compact stars SMC X-4, LMC X-4. The trends of all the variables are well defined and physically acceptable. The masses and radii of the stellar objects SMCX-4, LMCX-4 are in close agreement with the available known parameters. The interior spacetime metric is to be matched with the Schwarzschild Vacuum Solution to ascertain the constant parameters. The adiabatic index exhibits physically reasonable trend and exceeds 4/3 throughout inside the compact fluid spheres. The stability of stellar models is analyzed via Herrera’s cracking concept and Harrison–Zel’dovich–Novikov criterion. The causality condition is well obeyed by the proposed stellar models. The TOV equation for the equilibrium of the fluid spheres is properly maintained inside the stellar models.

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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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