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Cosmological evolution via interacting/non-interacting holographic dark energy model for curved FLRW space–time in Rastall gravity
Physics of the Dark Universe ( IF 5.5 ) Pub Date : 2021-03-26 , DOI: 10.1016/j.dark.2021.100808
Rabia Saleem , Shahnila

In this work, we explore the phenomenon of cosmic evolution using curved FLRW space–time bounded by apparent horizon with a specific holographic cut-off. To this end, we use the framework of Rastall gravity (RG) and universe is assumed to be consists of interacting/ non-interacting dark energy (DE) and dark matter (DM). In both scenarios, we evaluate exact solutions of the dynamical equations and constraint the holographic parameter c2(z) assuming a slowly varying function of red-shift during non-interacting model. For interacting model, we consider c2 as a constant function of red-shift. Moreover, we analyze nature of the obtained results via deceleration parameter (q), statefinder pair (j,s) and Om(z)-diagnostic by constraining the involved model parameters using latest observational data. The graphical analysis showed that interacting model is very close to Λ cold DM (ΛCDM) model as compared to non-interacting case. We conclude that this holographic proposal is enough to describe the cosmic evolution at an accelerating rate.



中文翻译:

通过相互作用/非相互作用全息暗能量模型对拉斯塔尔引力弯曲的FLRW时空进行宇宙演化

在这项工作中,我们使用弯曲的FLRW时空探索宇宙演化的现象,时空以视界为界,并带有特定的全息截止点。为此,我们使用Rastall重力(RG)的框架,并且假定宇宙由相互作用/不相互作用的暗能量(DE)和暗物质(DM)组成。在这两种情况下,我们评估动力学方程的精确解并限制全息参数C2个ž假设在非交互模型中红移的缓慢变化函数。对于交互模型,我们考虑C2个作为红移的恒定函数。此外,我们通过减速参数分析获得的结果的性质q,状态查找器对 ĴsØž通过使用最新的观测数据来约束所涉及的模型参数来进行诊断。图形分析表明,交互模型非常接近Λ 冷DM(ΛCDM)模型与非互动案例相比。我们得出结论,该全息提议足以描述加速发展的宇宙演化。

更新日期:2021-03-29
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