New Astronomy ( IF 2 ) Pub Date : 2021-06-24 , DOI: 10.1016/j.newast.2021.101647 T. Vinutha , K. Venkata Vasavi
Four dimensional FRW perfect fluid cosmological model is obtained in the frame of theory of gravity, where is Ricci scalar and is the trace of the energy momentum tensor. The solutions of the field equations are obtained by taking the functional form , where and and scale factor as (hybrid scale factor) with , as constants, and . The dynamical parameters namely deceleration parameter (), Hubble parameter (), volume () and expansion scalar () are obtained. In addition to these we have studied energy conditions thoroughly. Also we have plotted graphs of all these parameters and energy conditions with respect to redshift () and these values matches with the recent observational data.
中文翻译:
FRW 完美流体宇宙学模型 -重力
四维FRW完美流体宇宙学模型在 万有引力理论,其中 是 Ricci 标量并且 是能量动量张量的迹。场方程的解是通过采用函数形式获得的, 在哪里 和 和比例因子为 (混合比例因子)与 , 作为常数, 和 . 动力参数即减速参数(), 哈勃参数 (), 体积 () 和扩展标量 () 获得。除了这些,我们还彻底研究了能量条件。我们还绘制了所有这些参数和能量条件相对于红移的图表() 并且这些值与最近的观测数据相匹配。