论文标题
宇宙关节分析与宇宙增长和膨胀速率
Cosmological joint analysis with cosmic growth and expansion rate
论文作者
论文摘要
扩展率的测量值$ h（z）$和增长率$fσ_8（z）$描述了宇宙的演变，并且两者都可以通过数据分析来限制宇宙学模型。由于缺乏数据点，这些数据集由传统的组合方法（$χ^2 $方法）组合在一起，以选择最合适的宇宙学模型。在2017年，Linder提出了一种联合方法，该方法描述了宇宙通过$ h（z）-Fσ_8$图而不是红移z的演变。与单个数据集相比，Linder证明了区分宇宙学的联合方法的优势。在本文中，我们通过使用Akaike信息标准（AIC）和贝叶斯信息标准（BIC）来限制密度参数$ω_m$来比较传统合并方法与linder的关节方法之间的重要性。结果表明，关节方法比传统的组合方法更重要。
The measurements of expansion rate $H(z)$ and the growth rate $fσ_8(z)$ describe the evolution of the universe, and both of them can constrain the cosmological models through data analysis. Due to the lack of data points, these datasets are combined by the traditional combined method ($χ^2$ method) to select a best-fitting cosmological model. In 2017, Linder proposed a joint method, which describes the evolution of the universe through $H(z)-fσ_8$ diagram instead of the redshift z. Compared to individual datasets, Linder demonstrated the advantages of the joint method to distinguish cosmologies. In this paper, we compare the significance between the traditional combined method and Linder's joint method by constraining the density parameter $Ω_M$ using Akaike Information Criterion (AIC) and Bayesian Information Criterion (BIC). The result shows that the joint method is more significant than the traditional combined method.
