First lensing measurements of SZ-discovered clusters

TL;DR

This paper reports the first weak lensing mass measurements of SZ-selected galaxy clusters, confirming the effectiveness of SZ selection in detecting massive clusters and comparing lensing masses with SZ observations.

Contribution

It provides the first lensing mass measurements of SZ-selected clusters and validates SZ selection as an effective method for identifying massive galaxy clusters.

Findings

SZ clusters have masses up to 5x10^14 Msun.

Lensing-derived masses are consistent with SZ observations.

SZ selection successfully detects high-mass clusters.

Abstract

We present the first lensing mass measurements of Sunyaev-Zel'dovich (SZ) selected clusters. Using optical imaging from the Southern Cosmology Survey (SCS), we present weak lensing masses for three clusters selected by their SZ emission in the South Pole Telescope survey (SPT). We confirm that the SZ selection procedure is successful in detecting mass concentrations. We also study the weak lensing signals from 38 optically-selected clusters in ~8 square degrees of the SCS survey. We fit Navarro, Frenk and White (NFW) profiles and find that the SZ clusters have amongst the largest masses, as high as 5x10^14 Msun. Using the best fit masses for all the clusters, we analytically calculate the expected SZ integrated Y parameter, which we find to be consistent with the SPT observations.