Resolving the Merging Planck Cluster PLCK G147.3-16.6 with GISMO
van Weeren, R. J.; Bulbul, E.; Kovács, A.; Clarke, T. E.; Intema, H. T.; Benford, D. J.; Mroczkowski, T.; Randall, S.; Staguhn, J.
United States
Abstract
The Planck satellite has recently completed an all-sky galaxy cluster survey exploiting the thermal Sunyaev-Zel’dovich (SZ) effect to locate some of the most massive systems observable. With a median redshift of < z> =0.22, the clusters found by Planck at z\gt 0.3 are proving to be exceptionally massive and/or disturbed systems. One notable Planck discovery at z = 0.645, PLCK G147.3-16.6, has an elongated core and hosts a radio halo, indicating it is likely in the process of merging. We present a 16.″5 resolution SZ observation of this high-z merger using the Goddard-IRAM Superconducting 2-Millimeter Observer, and compare it to X-ray follow-up observations with XMM-Newton. We find the SZ pressure substructure is offset from the core components seen in X-ray. We interpret this as possible line of sight temperature or density substructure due to the on-going merger.