论文标题
使用不相关的BARYON声学振荡数据集测试晚期宇宙加速
Testing Late Time Cosmic Acceleration with uncorrelated Baryon Acoustic Oscillations dataset
论文作者
论文摘要
Baryon声学振荡（BAO）涉及测量星系的空间分布以确定宇宙结构的生长速率。我们从$ 17 $不相关的BAO测量值中得出了对宇宙学参数的限制，这些测量值是从$ 333 $发布的有效红移范围内发布的数据点收集的$ 0.106 \ leq Z \ leq Z \ leq 2.36 $。我们使用随机协方差矩阵测试子集的相关性。 $λ$ CDM型号拟合产生宇宙学参数：$ω_m= 0.261 \ pm 0.028 $和$Ω__λ= 0.733 \ pm 0.021 $。将BAO数据与宇宙序列式数据，万神殿IA型超新星和伽马射线爆发和类星体的哈勃图相结合，Hubble Consant产生$ 69.85 \ pm 1.27 km/sec/sec/mpc $和声音范围，并给出：$ 146.1.1 \ pm pm 2.15 mpc $ 2.15 mpc $。除了$λ$ CDM模型，我们测试$ω_k$ cdm和WCDM。空间曲率为$ω_k= -0.076 \ pm 0.012 $和状态的暗能量方程：$ W = -0.989 \ pm 0.049 $。 {我们执行AIC测试以比较三种型号，并看到$λ$ CDM分数最佳。
Baryon Acoustic Oscillations (BAO) involve measuring the spatial distribution of galaxies to determine the growth rate of cosmic structure. We derive constraints on cosmological parameters from $17$ uncorrelated BAO measurements that were collected from $333$ published data points in the effective redshift range $0.106 \leq z \leq 2.36$. We test the correlation of the subset using random covariance matrix. The $Λ$CDM model fit yields the cosmological parameters: $Ω_m = 0.261 \pm 0.028$ and $Ω_Λ= 0.733 \pm 0.021$. Combining the BAO data with the Cosmic Chronometers data, the Pantheon Type Ia supernova and the Hubble Diagram of Gamma Ray Bursts and Quasars, the Hubble constant yields $ 69.85 \pm 1.27 km/sec/Mpc$ and the sound horizon distance gives: $ 146.1 \pm 2.15 Mpc$. Beyond the $Λ$CDM model we test $Ω_K$CDM and wCDM. The spatial curvature is $Ω_k = -0.076 \pm 0.012$ and the dark energy equation of states: $w = -0.989 \pm 0.049$. {We perform AIC test to compare the 3 models and see that $Λ$CDM scores best.
