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We present measurements of the stellar mass fractions ($f_\star$) for asample of high-redshift ($0.93 \le z \le 1.32$) infrared-selected galaxyclusters from the Massive and Distant Clusters of WISE Survey (MaDCoWS) andcompare them to the stellar mass fractions of Sunyaev-Zel'dovich (SZ)effect-selected clusters in a similar mass and redshift range from the SouthPole Telescope (SPT)-SZ Survey. We do not find a significant difference in mean$f_\star$ between the two selection methods, though we do find an unexpectedlylarge range in $f_\star$ for the SZ-selected clusters. In addition, we measurethe luminosity function of the MaDCoWS clusters and find $m^*= 19.41\pm0.07$,similar to other studies of clusters at or near our redshift range. Finally, wepresent SZ detections and masses for seven MaDCoWS clusters and newspectroscopic redshifts for five MaDCoWS clusters. One of these new clusters,MOO J1521+0452 at $z=1.31$, is the most distant MaDCoWS cluster confirmed todate.

The Massive and Distant Clusters of WISE Survey VI: Stellar Mass Fractions of a Sample of High-Redshift Infrared-selected Clusters