Compact objects by gravitational decoupling in f(R) gravity

被引:20
|
作者
Sharif, M. [1 ]
Aslam, Mariyah [1 ]
机构
[1] Univ Punjab, Dept Math, Quaid E Azam Campus, Lahore 54590, Pakistan
来源
EUROPEAN PHYSICAL JOURNAL C | 2021年 / 81卷 / 07期
关键词
APPROACHING SCHWARZSCHILD LIMIT; DYNAMICAL INSTABILITY; ANISOTROPIC SOLUTIONS; STARS; STABILITY; FLUID; MASS; EQUATIONS; CRACKING; SPHERES;
D O I
10.1140/epjc/s10052-021-09436-7
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
The objective of this paper is to discuss anisotropic solutions representing static spherical self-gravitating systems in f(R) theory. We employ the extended gravitational decoupling approach and transform temporal as well as radial metric potentials which decomposes the system of non-linear field equations into two arrays: one set corresponding to seed source and the other one involves additional source terms. The domain of the isotropic solution is extended in the background of f(R) Starobinsky model by employing the metric potentials of Krori-Barua spacetime. We determine two anisotropic solutions by employing some physical constraints on the extra source. The values of unknown constants are computed by matching the interior and exterior spacetimes. We inspect the physical viability, equilibrium and stability of the obtained solutions corresponding to the star Her X-I. It is observed that one of the two extensions satisfies all the necessary physical requirements for particular values of the decoupling parameter.
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页数:17
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