论文标题
$ f（r，t）$重力的观察性约束来自宇宙天文序列和一些标准距离测量参数
Observational Constraint in $f(R,T)$ gravity from the cosmic chronometers and some standard distance measurement parameters
论文作者
论文摘要
在这项工作中，我们对$ f（r，t）$重力进行了观察数据分析，目的是限制模型的参数空间。考虑了五种不同的模型，并在我们的分析中使用了30点$ z-h（z）$ cosmic计时仪数据。 $χ^2 $统计量被公式为$ h（z）$的理论值和观察到的$ h（z）$之间的差异。为了获得免费参数模型的最佳拟合值，已努力最小化统计数据。我们还使用了一些标准的距离测量参数，例如BAO和CMB峰以及数据，以实现对参数空间的更好约束。我们已经使用了公开可用的\ textit {cosmomc}代码，以不同的置信区间以$ 68 \％$，$ 95 \％$，$ 99 \％$获得模型的免费参数的界限。上述各种置信度级别的1D分布和2D关节置信度轮廓是使用\ textIt {CosMOMC}代码生成免费参数的。最后，我们的模型与某些统计技术使用观察数据进行了比较，并使用观察数据进行了比较，并探测了对数据中对模型的支持。
In this work we perform an observational data analysis on the $f(R,T)$ gravity with the aim of constraining the parameter space of the model. Five different models are considered and the 30 point $z-H(z)$ cosmic chronometer data is used in our analysis. The $χ^2$ statistic is formulated as a difference between the theoretical and the observed values of $H(z)$ for different values of redshift $z$. Efforts have been made to minimize the statistic in order to get the best fit values for the free parameters models. We have also used some standard distance measurement parameters like BAO and CMB peaks along with the data for achieving better constraints on the parameter space. We have used the publicly available \textit{CosmoMC} code for obtaining the bounds for the free parameters of the models in different confidence intervals like $68\%$, $95\%$, $99\%$. 1D distributions and 2D joint confidence contours for various confidence levels mentioned above are generated for the free parameters using the \textit{CosmoMC} code. Finally our models have been compared with the standard $ΛCDM$ model by some statistical techniques using the observational data and the support for the models from the data is probed.
