CCCP和MENeaCS：100个星系团的弱透镜质量
CCCP and MENeaCS: (updated) weak-lensing masses for 100 galaxy clusters
摘要：
大面积的巡天已经探测到了大量的星系团样本，这些样本可以用来限制宇宙学参数，前提是星系团的质量得到了可靠的测量。为了提高使用弱引力透镜的集群质量的校准，我们提出了新的结果，48个集群在$0.05<z<0.15$，观察到的一部分，多时代附近的集群调查（MENeaCS），并重新评估质量估计52个集群从加拿大集群比较项目（CCCP）。更新的高保真度光度红移目录的参考深场与形状测量和国家的最先进的集群模拟的进步相结合，产生的透镜信号的平均系统的不确定性低于5%，类似于我们的集群样本的统计不确定性。我们推导出一个标度关系与普朗克测量的完整的样品，并找到一个偏见的普朗克质量的$1-b=0.84 \pm 0.04$。我们没有发现统计上的显着趋势的红移或集群质量的质量偏差，但发现不同的选择可以改变偏差高达1.5 $σ$。我们在8个弛豫星系团中发现了$0.139 \pm 0.014$的气体分数，这也可以用来推断宇宙学参数。
英文摘要：
Large area surveys have detected significant samples of galaxy clusters that can be used to constrain cosmological parameters, provided that the masses of the clusters are measured robustly. To improve the calibration of cluster masses using weak gravitational lensing we present new results for 48 clusters at $0.05<z<0.15$, observed as part of the Multi Epoch Nearby Cluster Survey (MENeaCS), and reevaluate the mass estimates for 52 clusters from the Canadian Cluster Comparison Project (CCCP). Updated high-fidelity photometric redshift catalogues of reference deep fields are used in combination with advances in shape measurements and state-of-the-art cluster simulations, yielding an average systematic uncertainty in the lensing signal below 5%, similar to the statistical uncertainty for our cluster sample. We derive a scaling relation with Planck measurements for the full sample and find a bias in the Planck masses of $1-b=0.84 \pm 0.04$. We find no statistically significant trend of the mass bias with redshift or cluster mass, but find that different selections could change the bias by up to 1.5$σ$. We find a gas fraction of $0.139 \pm 0.014$ for 8 relaxed clusters in our sample, which can also be used to infer cosmological parameters.
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