ΛCDM epoch reconstruction from F(R, G) and modified Gauss-Bonnet gravities

被引：228

作者：

Elizalde, E. ^{[1
]}

Myrzakulov, R. ^{[2
]}

Obukhov, V. V. ^{[3
]}

Saez-Gomez, D. ^{[1
]}

机构：

[1] IEEC, CSIC, ICE, Fac Ciencies, E-08193 Barcelona, Spain

[2] Eurasian Natl Univ, Dept Gen & Theoret Phys, Astana 010008, Kazakhstan

[3] Tomsk State Pedag Univ, Tomsk, Russia

来源：

CLASSICAL AND QUANTUM GRAVITY | 2010年 / 27卷 / 09期

关键词：

DARK ENERGY;

D O I：

10.1088/0264-9381/27/9/095007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Dark energy cosmology is considered in a modified Gauss-Bonnet model of gravity with and without a scalar field. It is shown that these generalizations of general relativity endow it with a very rich cosmological structure: it may naturally lead to an effective cosmological constant, quintessence or phantom cosmic acceleration, with the possibility of describing the transition from a decelerating to an accelerating phase explicitly. It is demonstrated here that these modified GB and scalar-GB theories are perfectly viable as cosmological models. They can describe the Lambda CDM cosmological era without any need for a cosmological constant. The specific properties of these theories of gravity in different particular cases, such as the de Sitter one, are studied.

引用

页数：13

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