CCCP and MENeaCS: (updated) weak-lensing masses for 100 galaxy clusters. Issue 4 (5th August 2020)

• Record Type: Journal Article
• Authors: Herbonnet, Ricardo; Sifón, Cristóbal; Hoekstra, Henk; Bahé, Yannick; van der Burg, Remco F J; Melin, Jean-Baptiste; von der Linden, Anja; Sand, David; Kay, Scott; Barnes, David
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 497:Issue 4(2020)
• Page Start: 4684
• Page End: 4703
• Publication Date: 2020-08-05
• Subjects: gravitational lensing: weak -- galaxies: clusters: individual -- cosmology: observations; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/staa2303
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: Large area surveys continue to increase the 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, and re-evaluate the mass estimates for 52 clusters from the Canadian Cluster Comparison Project. 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 per cent, 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 ± 0.04 (stat) ±0.05 (syst). 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 0.07. We find a gas fraction of 0.139 ± 0.014 (stat) for eight relaxed clusters in our sample, which can also be used to infer cosmological parameters.