论文标题

观察性哈勃参数数据约束$ f(t)$重力与粒子创建

Observational Hubble parameter data constraints on the interactive model of $f(T)$ gravity with particle creation

论文作者

Ganjizadeh, S., Amani, Alireza, Ramzanpour, M. A.

论文摘要

在本文中,我们从热力学的角度考虑了一个开放的系统,用于绝热的FRW宇宙模型,其中粒子在系统内发生。在这种情况下,获得了修改后的连续性方程,然后将其与$ f(t)$重力的连续性方程相对应。因此,我们采用$ f(t)$重力,带有粘性流体,以平面限制度量为单位,其中$ t $是扭转标量。我们将宇宙的内容视为暗物质和暗能量,并考虑它们之间的相互作用术语。这项研究的有趣点是,我们使粒子创建所产生的修改后连接方程与$ f(t)$ gravity产生的物质连续性方程。该评估的结果创造了粒子数量与比例因子之间的关系。在接下来的内容中,我们根据粒子数量编写相应的宇宙学参数,并根据红移参数重建粒子的数量,然后我们将来自powerlaw宇宙学得出的哈勃参数参数化,并使用来自Hubble观察力参数的51个数据。接下来,我们用红移来绘制黑暗能量的相应宇宙学参数,以研究宇宙的加速膨胀。此外,通过使用声速参数,我们讨论了宇宙不同时代中本模型的稳定性分析和不稳定性分析。最后,我们根据红移参数绘制暗能量和暗物质的密度参数值。

In this paper, we consider an open system from the thermodynamic perspective for an adiabatic FRW universe model in which particle creation occurs within the system. In that case, the modified continuity equation is obtained and then we correspond it to the continuity equation of $f(T)$ gravity. So, we take $f(T)$ gravity with the viscous fluid in flat-FRW metric, in which $T$ is the torsion scalar. We consider the contents of the universe to be dark matter and dark energy and consider an interaction term between them. The interesting point of this study is that we make equivalent the modified continuity equation resulting from the particle creation with the matter continuity equation resulting from $f(T)$ gravity. The result of this evaluation creates a relationship between the number of particles and the scale factor. In what follows, we write the corresponding cosmological parameters in terms of the number of particles and also reconstruct the number of particles in terms of the redshift parameter, then We parameterize the Hubble parameter derived from power-law cosmology with 51 data from the Hubble observational parameter. Next, we plot the corresponding cosmological parameters for the dark energy in terms of the redshift to investigate the accelerated expansion of the universe. In addition, by using the sound speed parameter, we discuss the stability analysis and instability analysis of the present model in different eras of the universe. Finally, we plot the density parameter values for dark energy and dark matter in terms of the redshift parameter.

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