论文标题
在$ f（r，t）$重力和与观察数据的对抗中存在散装粘性宇宙
Existence of bulk viscous universe in $f(R,T)$ gravity and confrontation with observational data
论文作者
论文摘要
在本文中，我们研究了$ f（r，t）$重力的散装粘性宇宙，其中$ r $和$ t $分别是RICCI标量和能量动量张量的痕迹。我们通过考虑比例因子的功率定律形式，在修饰的重力中获得了现场方程的明确解决方案。哈勃参数和减速参数是根据宇宙时间和红移而得出的。我们已经使用观察性哈勃数据和SN IA数据集估算了这些参数的当前值。在1 $σ$级别时，$ q_ {0} $和$ m $的估计值作为$ q_ {0} = -0.30 \ pm 0.05 $ \＆$ m = 0.70 \ pm 0.02 $，其中$ q_ {0} $是$ q_ {0} $是模型参数的当前值。还讨论了各向异性LRS Bianchi I型模型的能量条件和OM（Z）分析。
In this paper we have investigated a bulk viscous universe in $f(R,T)$ gravity where $R$ and $T$ are the Ricci scalar and trace of energy momentum tensor respectively. We have obtained explicit solutions of field equations in modified gravity by considering the power law form of scale factor. The Hubble parameter and deceleration parameter are derived in terms of cosmic time and redshift both. We have estimated the present values of these parameters with observational Hubble data and SN Ia data sets. At 1$σ$ level, the estimated values of $q_{0}$ and $m$ are obtained as $q_{0}=-0.30 \pm 0.05$ \& $ m = 0.70 \pm 0.02 $ where $q_{0}$ is the present value of deceleration parameter and $m$ is the model parameter. The energy conditions and Om(z) analysis for the anisotropic LRS Bianchi type I model are also discussed.
