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We have imaged the Sunyaev-Zel'dovich (SZ) effect signals at 140 and 270 GHztowards ten galaxy clusters with Bolocam and AzTEC/ASTE. We also used Planckdata to constrain the signal at large angular scales, Herschel-SPIRE images tosubtract the brightest galaxies that comprise the cosmic infrared background(CIB), Chandra imaging to map the electron temperature $T_e$ of theintra-cluster medium (ICM), and HST imaging to derive models of each galaxycluster's mass density. The galaxy clusters gravitationally lens the backgroundCIB, which produced an on-average reduction in brightness towards the galaxyclusters' centers after the brightest galaxies were subtracted. We correctedfor this deficit, which was between 5-25% of the 270 GHz SZ effect signalwithin $R_{2500}$. Using the SZ effect measurements, along with the X-rayconstraint on $T_e$, we measured each galaxy cluster's average line of sight(LOS) velocity $v_z$ within $R_{2500}$, with a median per-cluster uncertaintyof +-700 km/s. We found an ensemble-mean <$v_z$> of 430+-210 km/s, and anintrinsic cluster-to-cluster scatter $\sigma_{int}$ of 470+-340 km/s. We alsoobtained maps of $v_z$ over each galaxy cluster's face with an angularresolution of 70". All four galaxy clusters previously identified as having amerger oriented along the LOS showed an excess variance in these maps at asignificance of 2-4$\sigma$, indicating an internal $v_z$ rms of $\gtrsim$1000km/s. None of the six galaxy clusters previously identified as relaxed or planeof sky mergers showed any such excess variance.

astrophysical journal/the astrophysical journal

Imaging the Thermal and Kinematic Sunyaev-Zel'dovich Effect Signals in a  Sample of Ten Massive Galaxy Clusters: Constraints on Internal Velocity  Structures and Bulk Velocities