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Compact stellar model in the presence of pressure anisotropy in modified Finch Skea space–time
Journal of Astrophysics and Astronomy ( IF 1.1 ) Pub Date : 2021-07-06 , DOI: 10.1007/s12036-021-09739-x
Piyali Bhar 1 , Pramit Rej 2
Affiliation  

A new model of an anisotropic compact star is obtained in our present paper by assuming the pressure anisotropy. The proposed model is singularity free. The model is obtained by considering a physically reasonable choice for the metric potential \(g_{rr}\), which depends on a dimensionless parameter n. The effect of n is discussed numerically, analytically, and through plotting. We have concentrated a wide range for n (\(10\le n \le 1000\)) for drawing the profiles of different physical parameters. The maximum allowable mass for different values of n has been obtained by the MR plot. We have checked that the stability of the model is increased for a larger value of n. For the viability of the model, we have considered two compact stars PSR J1614-2230 and EXO 1785-248. We have shown that the expressions for the anisotropy factor and the metric component may serve as generating functions for uncharged stellar models in the context of general theory of relativity.



中文翻译:

修正 Finch Skea 时空存在压力各向异性的致密恒星模型

我们在本文中通过假设压力各向异性获得了一个各向异性致密星的新模型。所提出的模型是无奇点的。该模型是通过考虑度量势\(g_{rr}\)的物理合理选择而获得的,这取决于无量纲参数n。的效果Ñ进行数值所讨论的,分析,并通过绘图。我们集中了广泛的n ( \(10\le n \le 1000\) ) 来绘制不同物理参数的轮廓。不同n值的最大允许质量已通过MR 获得阴谋。我们已经检查过,对于较大的n值,模型的稳定性会增加。为了模型的可行性,我们考虑了两颗致密星 PSR J1614-2230 和 EXO 1785-248。我们已经表明,在广义相对论的背景下,各向异性因子和度量分量的表达式可以作为不带电恒星模型的生成函数。

更新日期:2021-07-06
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