KiDS-DR3中的AMICO星系团：对宇宙学参数的限制和对来自成团的质量-丰度关系的标准化的限制
AMICO galaxy clusters in KiDS-DR3: Constraints on cosmological parameters and on the normalisation of the mass-richness relation from clustering
摘要：
我们分析了从第三次千度巡天数据发布中选取的星系团的光度样本的聚类，重点是红移空间两点相关函数（2 PCF）。我们将我们的测量结果与标准$Λ$冷暗物质（$Λ$ CDM）宇宙学模型的理论预测进行了比较。我们测量了4934个在红移范围$z\in[0.1,0.6]$内具有丰富$λ^*\geq15$的星系团在星系团中心径向范围$r\in[5,80]$ $h^{-1}$ Mpc内的样品的2 PCF。一个马尔可夫链蒙特卡罗分析已被执行约束的宇宙学参数$Ω_{\rm m}$，$σ_8$，和$S_8 \equiv σ_8(Ω_{\rm m}/0.3)^{0.5}$，假设高斯先验的质量丰富度的关系给出的后验从一个联合分析的集群计数和弱透镜。此外，我们用固定的宇宙学参数约束了质量丰富度关系$α$的归一化。我们获得了$Ω_{\rm m}=0.28^{+0.05}_{-0.04}$、$σ_8=0.82^{+0.14}_{-0.12}$和$S_8=0.80^{+0.08}_{-0.08}$。对$S_8$的约束在1 $σ$范围内与WMAP和Planck的结果一致。此外，通过将宇宙学参数固定为普朗克提供的宇宙学参数，我们得到了$α=0.12^{+0.06}_{-0.06}$，这与对该样本进行团簇计数和弱透镜联合分析得到的结果完全一致。
英文摘要：
We analysed the clustering of a photometric sample of galaxy clusters selected from the Third Data Release of the Kilo-Degree Survey, focusing on the redshift-space two-point correlation function (2PCF). We compared our measurements to theoretical predictions of the standard $Λ$ cold dark matter ($Λ$CDM) cosmological model. We measured the 2PCF of the sample in the cluster centric radial range $r\in[5,80]$ $h^{-1}$Mpc, considering 4934 galaxy clusters with richness $λ^*\geq15$ in the redshift range $z\in[0.1,0.6]$. A Markov chain Monte Carlo analysis has been performed to constrain the cosmological parameters $Ω_{\rm m}$, $σ_8$, and $S_8 \equiv σ_8(Ω_{\rm m}/0.3)^{0.5}$, assuming Gaussian priors on the mass-richness relation given by the posteriors obtained from a joint analysis of cluster counts and weak lensing. In addition, we constrained the normalisation of the mass-richness relation, $α$, with fixed cosmological parameters. We obtained $Ω_{\rm m}=0.28^{+0.05}_{-0.04}$, $σ_8=0.82^{+0.14}_{-0.12}$, and $S_8=0.80^{+0.08}_{-0.08}$. The constraint on $S_8$ is consistent within 1$σ$ with the results from WMAP and Planck. Furthermore, by fixing the cosmological parameters to those provided by Planck, we obtained $α=0.12^{+0.06}_{-0.06}$, which is fully consistent with the result obtained from the joint analysis of cluster counts and weak lensing performed for this sample.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
