论文标题
用SDSS-IV DR16类星体测量宇宙同质性量表
Measuring the cosmic homogeneity scale with SDSS-IV DR16 Quasars
论文作者
论文摘要
我们使用Sloan Digital Sky Survey（SDSS-IV DR16）的第16个数据发布的最近发布的类星体样本报告了宇宙同质性（$ r_ {h} $）规模的测量值。我们通过分形尺寸$ d_2 $在2.2 $ 2.2 <z <3.2 $中进行2个红移箱进行分析。通过采用通常的假设，即当$ r_ {h} $是$ d_2 \ sim 2.97 $（即$ d_2 = 3 $的1％以内），我们发现宇宙同质性量表的趋势与redshift的趋势下降，并且与$λ$ cdmctictication cdmictication cdmictication cdmictication as a redshift非常吻合。我们的结果证实了标准宇宙学模型的基本假设所预测的类星体的空间分布中存在同质性量表。
We report measurements of the scale of cosmic homogeneity ($r_{h}$) using the recently released quasar sample of the sixteenth data release of the Sloan Digital Sky Survey (SDSS-IV DR16). We perform our analysis in 2 redshift bins lying in the redshift interval $2.2 < z < 3.2$ by means of the fractal dimension $D_2$. By adopting the usual assumption that $r_{h}$ is obtained when $D_2 \sim 2.97$, that is, within 1% of $D_2=3$, we find the cosmic homogeneity scale with a decreasing trend with redshift, and in good agreement with the $Λ$CDM prediction. Our results confirm the presence of a homogeneity scale in the spatial distribution of quasars as predicted by the fundamental assumptions of the standard cosmological model.
