Kantowski-Sachs scalar field cosmological models in a modified theory of gravity

被引:20
|
作者
Santhi, M. Vijaya [1 ]
Rao, V. U. M. [1 ]
Aditya, Y. [1 ]
机构
[1] Andhra Univ, Dept Appl Math, Visakhapatnam 530003, Andhra Pradesh, India
关键词
Kantowski-Sachs model; f(R; T); gravity; scalar field cosmology; modified gravity; DARK-ENERGY; PERFECT FLUID; F(R; T); THEORY; UNIVERSE; CONSEQUENCES; SUPERNOVAE; COMPONENT; DYNAMICS; EQUATION; LAMBDA;
D O I
10.1139/cjp-2016-0718
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In this paper, we investigate the anisotropic Kantowski-Sachs model in the f(R, T) theory of gravity proposed by Harko et al. (Phys. Rev. D, 84, 024020, 2011) with scalar field (quintessence or phantom). Here R is the Ricci scalar and T is the trace of the energy-momentum tensor. The field equations have been solved using the fact that scalar expansion is proportional to the shear scalar of the space-time. We explore the behavior of the deceleration parameter, which represents a transition of the universe from the early decelerating phase to the present accelerated phase. Some physical properties and various cosmological distance measures are also obtained and discussed.
引用
收藏
页码:136 / 144
页数:9
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