Constant volume exponential solutions in Einstein-Gauss-Bonnet flat anisotropic cosmology with a perfect fluid

被引：19

作者：

Chirkov, Dmitry ^{[1
,2
]}

Pavluchenko, Sergey A. ^{[3
]}

Toporensky, Alexey ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Sternberg Astron Inst, Moscow 119991, Russia

[2] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119991, Russia

[3] Univ Austral Chile, Inst Ciencias Fis & Matemat, Valdivia, Chile

来源：

GENERAL RELATIVITY AND GRAVITATION | 2014年 / 46卷 / 10期

关键词：

Gauss-Bonnet gravity; Exact solutions; Cosmology; Modified gravity; DIMENSIONAL REDUCTION; LOVELOCK COSMOLOGY; GRAVITY; MODEL; SINGULARITY; TENSOR; TERM;

D O I：

10.1007/s10714-014-1799-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper we investigate the constant volume exponential solutions (i.e. the solutions with the scale factors change exponentially over time so that the comoving volume remains the same) in the Einstein-Gauss-Bonnet gravity. We find conditions for these solutions to exist and show that they are compatible with any perfect fluid with the equation of state parameter. omega<1/3 if the matter density of the Universe exceeds some critical value. We write down some exact solutions which generalize ones found in our previous paper for models with a cosmological constant.

引用

页码：1 / 14

页数：14

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