Gravastars in f (R, G) gravity

被引：46

作者：

Bhatti, M. Z. ^{[1
]}

Yousaf, Z. ^{[1
]}

Rehman, A. ^{[1
]}

机构：

[1] Univ Punjab, Dept Math, Quaid I Azam Campus, Lahore 54590, Pakistan

来源：

PHYSICS OF THE DARK UNIVERSE | 2020年 / 29卷

关键词：

Anisotropic fluid; Self-gravitation; Isotropic matter; THIN-SHELL WORMHOLES; STIFF EQUATION; EVOLUTION; UNIVERSE; ENERGY; FIELDS;

D O I：

10.1016/j.dark.2020.100561

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper, we discuss some feasible features of gravastar that was firstly demonstrated by Mazur and Mottola. It is already established that gravastar associates the de-Sitter spacetime in its inner sector with the Schwarzschild geometry at its exterior through the thin shell possessing the ultra-relativistic matter. We have explored the singularity free spherical model with a particular equation of state under the influence of f (R,G) gravity, where R is the Ricci scalar and G is the Gauss-Bonnet term. The interior geometry is matched with a suitable exterior using Israel formalism. Also, we discussed feasible solution of gravastar which describes the other physically sustainable factors under the influence of f (R,G) gravity. Different realistic characteristics of the gravastar model are discussed, in particular, shell's length, entropy and energy. A significant role of this particular gravity is examined for the sustainability of gravastar model. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：7

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