Unified dark fluid in Brans-Dicke theory

被引：39

作者：

Tripathy, Sunil K. ^{[1
]}

Behera, Dipanjali ^{[2
]}

Mishra, Bivudutta ^{[3
]}

机构：

[1] Indira Gandhi Inst Technol, Dept Phys, Dhenkanal 759146, Odisha, India

[2] Govt Coll Engn, Dept Phys, Kalahandi 766002, Odisha, India

[3] Birla Inst Technol & Sci Pilani, Dept Math, Hyderabad 500078, Andhra Pradesh, India

来源：

EUROPEAN PHYSICAL JOURNAL C | 2015年 / 75卷 / 04期

关键词：

PROBE WMAP OBSERVATIONS; OBSERVATIONAL CONSTRAINTS; DECELERATION PARAMETER; COSMOLOGICAL MODELS; GENERAL-RELATIVITY; POWER-SPECTRUM; ENERGY; UNIVERSE; EQUATION; GRAVITY;

D O I：

10.1140/epjc/s10052-015-3371-3

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

Anisotropic dark energy cosmological models are constructed in the frame work of generalised Brans-Dicke theory with a self-interacting potential. A unified dark fluid characterised by a linear equation of state is considered as the source of dark energy. The shear scalar is considered to be proportional to the expansion scalar simulating an anisotropic relationship among the directional expansion rates. The dynamics of the universe in the presence of a unified dark fluid in anisotropic background have been discussed. The presence of an evolving scalar field makes it possible to get an accelerating phase of expansion even for a linear relationship among the directional Hubble rates. It is found that the anisotropy in expansion rates does not affect the scalar field, the self-interacting potential, but it controls the non-evolving part of the Brans-Dicke parameter.

引用

页数：11

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