论文标题
$ f（r）$ - 重力中的曲率优势脱模
Curvature dominance DE-model in $f(R)$-gravity
论文作者
论文摘要
我们已经在$ f（r）$ - 重力中探测了宇宙学模型，这是标量曲率$ r $的立方方程。由于非线性$ f（r）$函数而产生的术语被视为曲率启发的几何形状。结果，我们发现宇宙中的加速膨胀，从而在其中产生了抗重物的负压。一些物理参数是使用数值方法求解的。该模型的演变由最新的观测哈勃数据（46-DATA点）和万神殿数据（SNIA的最新汇编，并在红移范围内进行了40个bin，$ 0.014 \ leqslant z \ leqslant1.62 $）。通过分析各种动态参数的图，已经讨论了模型的一些重要特征。减速参数$ q $和哈勃参数$ h $的图描述了当前时期宇宙演变中的加速扩展。从减速到我们的模型加速度的过渡是在Redshift $ z_ {tr} \ simeq 0.694069 $上获得的，这与$λ$ CDM非常吻合。我们还为我们的模型进行了州查找器分析。对模型的特定特征的分析证实，我们的模型与后期$λ$ CDM一致。
We have probed a cosmological model in $f(R)$-gravity, which is a cubic equation in scalar curvature $R$. The terms arise due to nonlinear $f(R)$ function are treated as energy due to curvature inspired geometry. As a result, we find accelerating expansion in the universe, which creates an anti-gravitating negative pressure in it. Some of the physical parameters are solved using numerical methods. The evolution of the model are examined by the latest observational Hubble data (46-data points) and Pantheon data (the latest compilation of SNIa with 40 binned in the redshift range $0.014 \leqslant z \leqslant1.62$). Some important features of the model have been discussed by analyzing the plots of various dynamical parameters. The plots of deceleration parameter $q$ and the Hubble parameter $H$ describe the accelerating expansion in the evolution of the Universe at the present epoch. The transition from deceleration to acceleration for our model is obtained at redshift $z_{tr} \simeq 0.694069$, which is in good agreement with $Λ$CDM. We have also carried out state finder analysis for our model. The analysis of specific features of the model confirms that our model is consistent with $Λ$CDM in late times.
