标题： $f(R,T)$引力与Ia型超新星数据的比较 显示英文标题

标题： Comparison of $f(R,T)$ Gravity with Type Ia Supernovae Data

摘要： 在$f(R,T)$引力中研究了宇宙的膨胀。 通过关注形式为$f(R,T)=f_1(R)+f_2(T)$的函数，我们断言如果$f_2(T)$的函数形式缓慢增长或随$T$而下降，则可以实现当今的加速膨胀。 特别是，我们证明当$f_2(T) \propto T^{-1}$时，宇宙在晚期时间过渡到指数增长，就像标准宇宙学模型中的情况一样。 将该模型的预测与Ia型超新星进行比较表明，该模型在不增加参数数量的情况下，对数据的拟合效果与标准宇宙学模型相当甚至略好。 显示英文摘要

摘要： The expansion of the universe in $f(R,T)$ gravity is studied. By focusing on functions of the form $f(R,T)=f_1(R)+f_2(T)$, we assert that present day acceleration can be achieved if the functional form of $f_2(T)$ either grows slowly or falls as a function of $T$. In particular, we demonstrate that when $f_2(T) \propto T^{-1}$, the universe transitions to exponential growth at late times, just as it does in the standard cosmological model. A comparison of predictions of this model, with Type Ia supernovae shows that this model fits the data as well or even slightly better than the standard cosmological model without increasing the number of parameters.