Anisotropic Cosmological Model in f (R,T) Theory of Gravity with a Quadratic Function of T

IF 1 Q3 PHYSICS, MULTIDISCIPLINARY
Chandra Rekha Mahanta, Shayanika Deka, Kankana Pathak
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引用次数: 0

Abstract

In this paper, we study spatially homogeneous and anisotropic Bianchi type-I space-time filled with perfect fluid within the framework of f(R,T) theory of gravity for the functional form f(R,T)=R+2f(T) with f(T)=αT+βT2, where α and β are constants. Exact solutions of the gravitational field equations are obtained by assuming the average scale factor to obey a hybrid expansion law and some cosmological parameters of the model are derived. Two special cases, leading to the power-law expansion and the exponential expansion, are also considered. We investigate the physical and geometrical properties of the models by studying the evolution graphs of some relevant cosmological parameters such as the Hubble parameter (H), the deceleration parameter ( q) etc.
f (R,T)重力理论中的各向异性宇宙学模型与T的二次函数
本文在f(R,T)引力理论框架下,研究了f(R,T)=R+2f(T), f(T)=αT+β t2的函数形式f(R,T)=R+2f(T),其中α和β为常数的空间均匀和各向异性的Bianchi - i型完全流体填充时空。假设平均尺度因子服从混合膨胀定律,得到了引力场方程的精确解,并推导了模型的一些宇宙学参数。还考虑了导致幂律展开和指数展开的两种特殊情况。我们通过研究哈勃参数(H)、减速参数(q)等相关宇宙学参数的演化图来研究这些模型的物理和几何性质。
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来源期刊
East European Journal of Physics
East European Journal of Physics PHYSICS, MULTIDISCIPLINARY-
CiteScore
1.10
自引率
25.00%
发文量
58
审稿时长
8 weeks
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