Stability analysis and observational measurement in 5-D Brans-Dicke cosmology

被引：4

作者：

Farajollahi, Hossein ^{[1
,2
]}

Salehi, Amin ^{[1
]}

机构：

[1] Univ Guilan, Dept Phys, Rasht, Iran

[2] Univ New S Wales, Sch Phys, Sydney, NSW 2052, Australia

来源：

PHYSICS LETTERS B | 2013年 / 718卷 / 03期

关键词：

Higher dimensional gravity; Brans-Dicke theory; Stability; Attractor; Statistical tests; Statefinder; HOLOGRAPHIC DARK ENERGY; PROBE WMAP OBSERVATIONS; MODIFIED GRAVITY; COSMIC ACCELERATION; POWER SPECTRUM; DATA RELEASE; CONSTRAINTS; OMEGA;

D O I：

10.1016/j.physletb.2012.11.027

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

This Letter is a study of the effects of higher dimensional gravity and Brans-Dicke (BD) scalar field on cosmic acceleration in 5-D BD cosmological model. We assume a flat cosmological model in which the matter content of the universe is either cold dark matter or radiation. In a framework to study attractor solutions in the phase space we simultaneously constrain the model parameters with the observational data for distance modulus. The phase space analysis illustrates that the universe begins from an unstable state in the past and eventually reaches an asymptotically stable state (attractor). We examine the model by performing Hubble parameter test in addition to statefinder diagnosis. We also reconstruct the equation of state parameter, the scale factor in 3-D space and along extra dimension. The results show that due to the presence of extra dimension and Brans-Dicke scalar field in the model, the universe undergoes a period of acceleration. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：709 / 717

页数：9

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