Resolving the Merging Planck Cluster PLCK G147.3-16.6 with GISMO
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 =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 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.
Additional Information
© 2015 The American Astronomical Society. Received 2015 January 20; accepted 2015 June 9; published 2015 July 14. We thank all of the staff at the IRAM 30 m for their support, and Israel Hermelo in particular. We also thank Rafael Eufrásio and Alexander Karim for their input on optimizing observational strategies with GISMO+IRAM, and we thank the anonymous referee for the diligence that led to vast improvements in our analysis of the GISMO SZ data. And finally, we thank Monique Arnaud for her insightful comments on the XMM-Newton observations. This research was performed while TM held a National Research Council Research Associateship Award at the Naval Research Laboratory (NRL). Basic research in radio astronomy at NRL by TM and TEC is supported by 6.1 Base funding. EB is supported in part by NASA ADP grant NNX13AE83G. RJvW is supported by NASA through the Einstein Postdoctoral grant number PF2-130104 awarded by the Chandra X-ray Center, which is operated by the Smithsonian Astrophysical Observatory for NASA under contract NAS8-03060. HTI is supported by the National Radio Astronomy Observatory, a facility of the National Science Foundation (NSF) operated under cooperative agreement by Associated Universities, Inc. The GISMO instrument and team are supported through NSF ATI grants 1020981 and 1106284. IRAM is supported by INSU/CNRS (France), MPG (Germany), and IGN (Spain).Attached Files
Published - 2041-8205_808_1_L6.pdf
Submitted - 1501.05051v3.pdf
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Additional details
- Eprint ID
- 59928
- Resolver ID
- CaltechAUTHORS:20150827-121622584
- Naval Research Laboratory
- NX13AE83G
- NASA
- PF2-130104
- NASA Einstein Fellowship
- NAS8-03060
- NASA
- National Radio Astronomy Observatory
- AST-1020981
- NSF
- AST-1106284
- NSF
- Institut national des sciences de l'Univers (INSU)
- Max-Planck-Gesellschaft
- Instituto Geográfico Nacional (IGN)
- Centre National de la Recherche Scientifique (CNRS)
- Created
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2015-08-28Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field