论文标题
kids-dr3中的Amico Galaxy群集：宇宙学的限制和堆叠弱镜头
AMICO galaxy clusters in KiDS-DR3: cosmological constraints from counts and stacked weak-lensing
论文作者
论文摘要
我们介绍了宇宙学的分析，并堆叠了星系簇的弱透镜轮廓，利用了Amico Kids-DR3目录。该样本由3652个星系簇组成，具有内在的丰富度$λ^*\ geq20 $，在377度$^2 $的有效面积上，在[0.1，\，0.6] $中的Redshift范围$ z \中。我们通过模拟量化了样本的纯度和完整性。统计分析是通过同时建模星系簇的合并数量密度以及固有丰富度和群集质量之间的缩放关系的，通过堆叠的弱透镜曲线建模进行了评估。物质背景密度的波动是由超级调查模式引起的，可能在可能的可能性中考虑了。假设使用$λ$ CDM型号，我们限制了$ω_ {\ rm m} $，$σ_8$，$ s_8 \equivσ_8（ω_ {\ rm m} /0.3）^{0.5} $，以及质量富度缩放量表的参数。我们获得了$ω_ {\ rm m} = 0.24^{+0.03} _ { - 0.04} $，$σ_8= 0.86^{+0.07} _ { - 0.07} $，$ s_8 = 0.78 = 0.78 = 0.78^{+0.04} {+0.04} {+0.04} _ { - 0.04} $ { - 0.04} $。 $ S_8 $的约束在1 $σ$之内与WMAP和Planck的结果保持一致。此外，我们对群集质量缩放关系的限制与从以前仅弱透明分析获得的群集质量缩放关系一致。
We present a cosmological analysis of abundances and stacked weak-lensing profiles of galaxy clusters, exploiting the AMICO KiDS-DR3 catalogue. The sample consists of 3652 galaxy clusters with intrinsic richness $λ^*\geq20$, over an effective area of 377 deg$^2$, in the redshift range $z\in[0.1,\,0.6]$. We quantified the purity and completeness of the sample through simulations. The statistical analysis has been performed by simultaneously modelling the comoving number density of galaxy clusters and the scaling relation between the intrinsic richnesses and the cluster masses, assessed through a stacked weak-lensing profile modelling. The fluctuations of the matter background density, caused by super-survey modes, have been taken into account in the likelihood. Assuming a flat $Λ$CDM model, we constrained $Ω_{\rm m}$, $σ_8$, $S_8 \equiv σ_8(Ω_{\rm m}/0.3)^{0.5}$, and the parameters of the mass-richness scaling relation. We obtained $Ω_{\rm m}=0.24^{+0.03}_{-0.04}$, $σ_8=0.86^{+0.07}_{-0.07}$, $S_8=0.78^{+0.04}_{-0.04}$. The constraint on $S_8$ is consistent within 1$σ$ with the results from WMAP and Planck. Furthermore, we got constraints on the cluster mass scaling relation in agreement with those obtained from a previous weak-lensing only analysis.
