Cosmological model with variable deceleration parameter in f(R, T) modified gravity

被引：31

作者：

Tiwari, Rishi Kumar ^{[1
]}

Beesham, Aroonkumar ^{[2
]}

Shukla, Bhupendra ^{[1
]}

机构：

[1] Pandit Shambunath Shukla Univ, Dept Math, Mpeb Colony, Shahdol 484001, Madhya Pradesh, India

[2] Univ Zululand, Dept Math Sci, ZA-3886 Kwa Dlangezwa, South Africa

来源：

INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS | 2018年 / 15卷 / 07期

关键词：

f(R; T); theory; LRS Bianchi type I; cosmological term; CONSTRAINTS; ANISOTROPY; UNIVERSE; LAMBDA; OMEGA; MAPS;

D O I：

10.1142/S0219887818501153

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A study is made of the LRS Bianchi type-I cosmological model in f(R, T) modified gravity theory. Einstein's field equations in f(R, T) gravity are solved by taking f(R, T) = R + 2f(T) and the deceleration parameter (q) to be a linear function of the Hubble parameter (H). The universe begins with an initial singular state and changes with time from an early deceleration phase to a late time acceleratio phase. We have found that the jerk parameter (j) in the model approaches that of the Lambda CDM model at late times. We also discuss the physical and geometrical properties of the model.

引用

页数：10

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