New Astronomy ( IF 1.9 ) Pub Date : 2021-06-06 , DOI: 10.1016/j.newast.2021.101636 Anirudh Pradhan , Archana Dixit
The present study deals with a Tsallis holographic dark energy model in a flat Friedmann-Lamatire-Rbertson-Walker space-time geometry in the context of higher derivative theory of gravity. We have solved the field equations by applying energy conservation-law in non-interacting case and have obtained such a scale factor where is called as model parameter which shows transit phase evolution of the universe (decelerating to accelerating). Using this scale factor we have obtained the various cosmological parameters viz. Hubble parameter , deceleration parameter (DP) , jerk , snap , lerk and max-out . Constraining on Hubble parameters by the observational data of we have obtained the present values of , and and by using these constrained values, we have studied other cosmological parameters. Taking the constant equation of state (EoS) for ordinary matter, we have investigated the effective behaviour of various cosmological parameters and energy conditions in our model. We have observed the present values of and discussed with CDM model. We have found the age of the present universe Gyrs, present value of DP and transition point which are compatible with several observational results.
中文翻译:
引力高导数理论中具有观测约束的Tsallis全息暗能量模型
本研究在高导引力理论的背景下处理平面弗里德曼-拉马蒂尔-Rbertson-Walker 时空几何中的 Tsallis 全息暗能量模型。我们通过在非相互作用情况下应用能量守恒定律来求解场方程,并获得了这样的比例因子 在哪里 被称为模型参数,它显示了宇宙的过渡阶段演化(减速到加速)。使用这个比例因子,我们获得了各种宇宙学参数,即。哈勃参数,减速参数(DP) ,混蛋 , 折断 , 勒克 和最大输出 . 对哈勃参数的约束 根据观测数据 我们已经获得了现值 , 和 通过使用这些约束值,我们研究了其他宇宙学参数。取常数状态方程 (EoS)对于普通物质,我们研究了模型中各种宇宙学参数和能量条件的有效行为。我们观察到的现值 并与 清洁发展机制模型。我们已经发现了现在宇宙的年龄 Gyrs,DP 的现值 和过渡点 这与几个观察结果兼容。