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American Astronomical Society, Astrophysical Journal Letters, 1(808), p. L6, 2015

DOI: 10.1088/2041-8205/808/1/l6

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Resolving the Merging Planck Cluster PLCK G147.3-16.6 with GISMO

Journal article published in 2015 by T. Mroczkowski ORCID, A. Kovács ORCID, E. Bulbul, J. Staguhn ORCID, D. J. Benford ORCID, T. E. Clarke, R. J. van Weeren ORCID, H. T. Intema ORCID, S. Randall ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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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>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 a dual 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 (GISMO), 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 offset as possible line of sight temperature or density substructure due to the on-going merger.