The Canadian Cluster Comparison Project: weak lensing masses and SZ scaling relations

TL;DR

This study uses weak lensing data from the Canadian Cluster Comparison Project to analyze galaxy cluster masses and their relation to SZ effect measurements, confirming SZ as a reliable mass proxy.

Contribution

It provides weak lensing masses for 50 galaxy clusters and compares these with SZ measurements, establishing a strong correlation and low scatter.

Findings

SZ signal correlates well with lensing mass

Intrinsic scatter in SZ-mass relation is 12±5%

Weak lensing masses serve as a reliable reference for cluster properties

Abstract

The Canadian Cluster Comparison Project is a comprehensive multi-wavelength survey targeting 50 massive X-ray selected clusters of galaxies to examine baryonic tracers of cluster mass and to probe the cluster-to-cluster variation in the thermal properties of the hot intracluster medium. In this paper we present the weak lensing masses, based on the analysis of deep wide-field imaging data obtained using the Canada-France-Hawaii-Telescope. The final sample includes two additional clusters that were located in the field-of-view. We take these masses as our reference for the comparison of cluster properties at other wavelengths. In this paper we limit the comparison to published measurements of the Sunyaev-Zel'dovich effect. We find that this signal correlates well with the projected lensing mass, with an intrinsic scatter of 12\pm5% at ~r_2500, demonstrating it is an excellent proxy for cluster mass.