Symmetry analysis and exact solutions of modified Brans-Dicke cosmological equations

被引：5

作者：

Arik, Metin ^{[1
]}

Sheftel, Mikhail B. ^{[1
]}

机构：

[1] Bogazici Univ, Dept Phys, TR-34342 Istanbul, Turkey

来源：

PHYSICAL REVIEW D | 2008年 / 78卷 / 06期

关键词：

D O I：

10.1103/PhysRevD.78.064067

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We perform a symmetry analysis of modified Brans-Dicke cosmological equations and present exact solutions. We discuss how the solutions may help to build models of cosmology where, for the early universe, the expansion is linear and the equation of state just changes the expansion velocity but not the linearity. For the late universe the expansion is exponential and the effect of the equation of state on the rate of expansion is just to change the constant Hubble parameter.

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页数：7

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