General Relativity and Gravitation ( IF 2.1 ) Pub Date : 2024-07-02 , DOI: 10.1007/s10714-024-03267-z Rabia Saleem , Shan Ali , M. Israr Aslam
This article explores the characteristics of interacting new Tsallis agegraphic dark energy (NTADE) and Sharma–Mittal holographic dark energy (SMHDE) models in a flat FLRW universe within Rastall gravity (RG). To check the viability of these models and to distinguish them, we develop important cosmological parameters including equation of state (EoS) parameter, deceleration parameter q, square speed of sound, statefinder pair and Om(z) diagnostic. By constraining the different parameters for both dark energy (DE) models, it is observed that: EoS parameter indicates phantom-like behavior, deceleration parameter is showing a phase transition from decelerating to accelerating phase. The (j, s) plane is indicating a rich behavior as it shows different DE eras like quintessence, phantom and Chaplygin gas for both models depending upon interacting term \(d^{2}\), parameter \(\delta \) and Rastall parameter \(\lambda \). The \(\omega _{D}-\omega ^{'}_{D}\) pair is indicating freezing region for NTADE but for SMHDE it initially falls in freezing region then move towards thawing region. We also check stability of NTADE/SMHDE models through the graphical interpretation of square speed of sound.
中文翻译:
通过拉斯塔引力内的宇宙学参数研究 NTADE 和 SMHDE 模型的相互作用
本文探讨了拉斯托引力 (RG) 内平坦 FLRW 宇宙中新的 Tsallis 年龄图形暗能量 (NTADE) 和 Sharma-Mittal 全息暗能量 (SMHDE) 模型相互作用的特征。为了检查这些模型的可行性并区分它们,我们开发了重要的宇宙学参数,包括状态方程 (EoS) 参数、减速参数 q、声速平方、寻态器对和 Om(z) 诊断。通过约束两个暗能量 (DE) 模型的不同参数,可以观察到:EoS 参数表示类似幻影的行为,减速参数表示从减速阶段到加速阶段的相变。 (j, s) 平面表明了丰富的行为,因为它显示了两个模型的不同 DE 时代,例如精髓、幻影和 Chaplygin 气体,具体取决于相互作用项 \(d^{2}\)、参数 \(\delta \) 和拉斯托尔参数 \(\lambda \)。 \(\omega _{D}-\omega ^{'}_{D}\) 对表示 NTADE 的冻结区域,但对于 SMHDE,它最初落在冻结区域,然后移向解冻区域。我们还通过声速平方的图形解释来检查 NTADE/SMHDE 模型的稳定性。