The Massive and Distant Clusters of WISE Survey. III. Sunyaev-Zel'dovich Masses of Galaxy Clusters at $z \sim 1$

TL;DR

This paper reports the detection and mass estimation of high-redshift galaxy clusters using Sunyaev-Zel'dovich observations from CARMA, confirming the effectiveness of the MaDCoWS survey in discovering massive clusters at $z oughly 1$.

Contribution

First SZ-based mass measurements of high-redshift clusters discovered by MaDCoWS, demonstrating the survey's capability to find the most massive clusters at $z oughly 1$ and beyond.

Findings

MaDCoWS clusters have masses $2-6 imes 10^{14} M_\odot$.

Detected clusters include some of the most massive at $z oughly 1$.

MaDCoWS can detect clusters up to $z oughly 1.3$.

Abstract

We present CARMA 30 GHz Sunyaev-Zel'dovich (SZ) observations of five high-redshift ($z \gtrsim 1$), infrared-selected galaxy clusters discovered as part of the all-sky Massive and Distant Clusters of WISE Survey (MaDCoWS). The SZ decrements measured toward these clusters demonstrate that the MaDCoWS selection is discovering evolved, massive galaxy clusters with hot intracluster gas. Using the SZ scaling relation calibrated with South Pole Telescope clusters at similar masses and redshifts, we find these MaDCoWS clusters have masses in the range $M_{200} \approx 2-6 \times 10^{14}$ $M_\odot$. Three of these are among the most massive clusters found to date at $z\gtrsim 1$, demonstrating that MaDCoWS is sensitive to the most massive clusters to at least $z = 1.3$. The added depth of the AllWISE data release will allow all-sky infrared cluster detection to $z \approx 1.5$ and beyond.