论文标题
SDSS-IV DR16发光红星系的角度尺度
The angular scale of homogeneity with SDSS-IV DR16 Luminous Red Galaxies
论文作者
论文摘要
我们使用最近发布的Sloan Digital Sky Survey（SDSS-IV LRG LRG DR16）的第16个数据发布的最新发光的红色星系样品报告了宇宙均匀性（$θ_{h} $）角度尺度的测量值。它由一种独立于模型的方法组成，因为我们仅使用这些对象的天体坐标来进行此类分析。观察数据分为细的红移箱，即$ 0.67 <z <0.68 $，$ 0.70 <z <0.71 $，$ 0.73 <z <0.74 $，以避免投射偏见，我们通过boottrap方法和模拟库的suite估计我们的不确定性。我们发现，LRGS表现出与所研究的红移间隔内标准宇宙学的预测一致的均匀性。考虑到以模型独立的方式获得测量的Boottrap方法，我们在1 $σ$级别上发现$θ_H^{boot}（0.675）= 7.57 \ pm 2.91 $ deg，$θ_h^^{boot} {boot}（0.705）（0.705） \ pm 2.81 $度这些结果与使用标准宇宙学模型假设建立的模拟目录获得的结果非常吻合。
We report measurements of the angular scale of cosmic homogeneity ($θ_{H}$) using the recently released luminous red galaxy sample of the sixteenth data release of the Sloan Digital Sky Survey (SDSS-IV LRG DR16). It consists of a model-independent method, as we only use the celestial coordinates of these objects to carry out such an analysis. The observational data is divided into thin redshift bins, namely $0.67<z<0.68$, $0.70<z<0.71$, and $0.73<z<0.74$, in order to avoid projection biases, and we estimate our uncertainties through a bootstrap method and a suite of mock catalogues. We find that the LRGs exhibit an angular scale of homogeneity consistent with the predictions of the standard cosmology within the redshift interval studied. Considering the bootstrap method, in which the measurements are obtained in a model-independent way, we found at 1$σ$ level that $θ_H^{boot}(0.675) = 7.57 \pm 2.91$ deg, $θ_H^{boot} (0.705) = 7.49 \pm 2.63$ deg and $θ_H^{boot} (0.735) = 8.88 \pm 2.81$ deg. Such results are in good agreement with the ones obtained using mock catalogues built under the assumption of the standard cosmological model.
