Next Generation Virgo Cluster Survey. XXI. The Weak Lensing Masses of the CFHTLS and NGVS RedGOLD Galaxy Clusters and Calibration of the Optical Richness
We measured stacked weak lensing cluster masses for a sample of 1325 galaxy clusters detected by the RedGOLD algorithm in the Canada-France-Hawaii Telescope Legacy Survey W1 and the Next Generation Virgo Cluster Survey at 0.2<z<0.5, in the optical richness range 10<λ<70. After a selection of our best richness subsample (20<λ<50), this is the most comprehensive lensing study of a ∼ 100% complete and ∼ 90% pure optical cluster catalogue in this redshift range, with a total of 346 clusters in ∼164
... deg^2. We test three different mass models, and our best model includes a basic halo model, with a Navarro Frenk and White profile, and correction terms that take into account cluster miscentering, non-weak shear, the two-halo term, the contribution of the Brightest Cluster Galaxy, and an a posteriori correction for the intrinsic scatter in the mass-richness relation. With this model, we obtain a mass-richness relation of M_ 200/M_=(14.48±0.04)+(1.14±0.23)(λ/40) (statistical uncertainties). This result is consistent with other published lensing mass-richness relations. When compared to X-ray masses and mass proxies, we find that on average weak lensing masses are ∼ 10% higher than those derived in the X-ray in the range 2×10^13M_<E(z) M^X_ 200<2×10^14M_, in agreement with most previous results and simulations. We also give the coefficients of the scaling relations between the lensing mass and X-ray mass proxies, L_X and T_X, and compare them with previous results.