A tomographic test of cosmological principle using the JLA compilation of type Ia supernovae
A tomographic test of cosmological principle using the JLA compilation of type Ia supernovae
复制标题
利用 Ia 型超新星 JLA 汇编进行宇宙学原理的层析测试
DOI：
10.1093/mnras/sty1120
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发表时间：
2018
影响因子：
4.8
通讯作者：
Wang Sai
中科院分区：
文献类型：
--
作者：
Chang Zhe;Lin Hai Nan;Sang Yu;Wang Sai
我们测试的宇宙学原理，通过拟合偶极调制的距离模和宇宙学红移方面的这种调制的演变搜索。基于红移层析方法，我们将Ia型超新星的联合光变曲线分析资料划分为不同的红移区间，并采用马尔可夫链蒙特-卡罗方法来推断各向异性的幅度和方向。然而，我们没有发现任何显着的偏离宇宙学原理，和各向异性振幅严格限制为小于千分之几在95美元的置信水平。
We test the cosmological principle by fitting a dipolar modulation of distance modulus and searching for an evolution of this modulation with respect to cosmological redshift. Based on a redshift tomographic method, we divide the Joint Light-curve Analysis compilation of supernovae of type Ia into different redshift bins, and employ a Markov-Chain Monte-Carlo method to infer the anisotropic amplitude and direction in each redshift bin. However, we do not find any significant deviations from the cosmological principle, and the anisotropic amplitude is stringently constrained to be less than a few thousandths at $95\%$ confidence level.