Stability of the Einstein static universe in f(R) gravity

被引：93

作者：

Bohmer, Christian G. ^{[1
]}

Hollenstein, Lukas ^{[1
]}

Lobo, Francisco S. N. ^{[1
]}

机构：

[1] Univ Portsmouth, Inst Cosmol & Graviat, Portsmouth PO1 2EG, Hants, England

来源：

PHYSICAL REVIEW D | 2007年 / 76卷 / 08期

关键词：

D O I：

10.1103/PhysRevD.76.084005

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze the stability of the Einstein static universe by considering homogeneous scalar perturbations in the context of f(R) modified theories of gravity. By considering specific forms of f(R), the stability regions of the solutions are parametrized by a linear equation of state parameter w = p/rho. Contrary to classical general relativity, it is found that in f(R) gravity a stable Einstein cosmos with a positive cosmological constant does indeed exist. Thus, we are lead to conclude that, in principle, modifications in f(R) gravity stabilize solutions which are unstable in general relativity.

引用

页数：6

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