Modified brane cosmologies with induced gravity, arbitrary matter content, and a Gauss-Bonnet term in the bulk

被引：21

作者：

Apostolopoulos, Pantelis S. ^{[1
]}

Brouzakis, Nikolaos ^{[2
]}

Tetradis, Nikolaos ^{[2
]}

Tzavara, Eleftheria ^{[2
]}

机构：

[1] Univ Illes Balears, Dept Fis, E-07122 Palma de Mallorca, Spain

[2] Univ Athens, Dept Phys, Athens 15784, Greece

来源：

PHYSICAL REVIEW D | 2007年 / 76卷 / 08期

关键词：

D O I：

10.1103/PhysRevD.76.084029

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We extend the covariant analysis of the brane cosmological evolution in order to take into account, apart from a general matter content and an induced-gravity term on the brane, a Gauss-Bonnet term in the bulk. The gravitational effect of the bulk matter on the brane evolution can be described in terms of the total bulk mass as measured by a bulk observer at the location of the brane. This mass appears in the effective Friedmann equation through a term characterized as generalized dark radiation that induces mirage effects in the evolution. We discuss the normal and self-accelerating branches of the combined system. We also derive the Raychaudhuri equation that can be used in order to determine if the cosmological evolution is accelerating.

引用

页数：11

共 78 条

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