Journal
ASTROPHYSICAL JOURNAL
Volume 749, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/749/1/46
Keywords
galaxies: clusters: individual (PLCKESZ G115.71+17.52, PLCKESZ G121.11+57.01, PLCKESZ G189.84-37.24); techniques: interferometric
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Funding
- Gordon and Betty Moore Foundation
- Kenneth T. and Eileen L. Norris Foundation
- James S. McDonnell Foundation
- Associates of the California Institute of Technology
- University of Chicago
- state of California
- state of Illinois
- state of Maryland
- National Science Foundation [AST 08-38260]
- CARMA partner universities (in particular NSF) [AST 0838187]
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We present the Combined Array for Research in Millimeter-wave Astronomy (CARMA) observations of the three northern unconfirmed galaxy clusters discovered by the Planck satellite. We confirm the existence of two massive clusters (PLCKESZ G115.71+17.52 and PLCKESZ G121.11+57.01) at high significance. For these clusters, we present refined centroid locations from the 31 GHz CARMA data, as well as mass estimates obtained from a joint analysis of CARMA and Planck data. We do not detect the third candidate, PLCKESZ G189.84-37.24, and place an upper limit on its mass of M-500 < 3.2 x 10(14) M-circle dot at 68% confidence. Considering our data and the characteristics of the Planck Early Sunyaev-Zel'dovich (ESZ) Catalog, we conclude that this object is likely to be a cold-core object in the plane of our Galaxy. As a result, we estimate the purity of the ESZ Catalog to be greater than 99.5%.
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