Muchovej, Stephen and Leitch, Erik and Culverhouse, Thomas and Carpenter, John and Sievers, Jonathan (2012) CARMA Follow-up of the Northern Unconfirmed Planck Galaxy Cluster Candidates. Astrophysical Journal, 749 (1). p. 46. ISSN 0004-637X http://resolver.caltech.edu/CaltechAUTHORS:20120430-110332521
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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 × 10^(14) M_☉ 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%.
|Additional Information:||© 2012 American Astronomical Society. Received 2011 December 4; accepted 2012 February 2; published 2012 March 20. We thank the staff of the Owens Valley Radio Observatory and CARMA for their outstanding support. We especially thank John Carlstrom for his efforts in spearheading the construction and operation of the SZA and for useful comments on the manuscript. Support for CARMA construction was derived from the Gordon and Betty Moore Foundation, the Kenneth T. and Eileen L. Norris Foundation, the James S. McDonnell Foundation, the Associates of the California Institute of Technology, the University of Chicago, the states of California, Illinois, and Maryland, and the National Science Foundation. Ongoing CARMA development and operations are supported by the National Science Foundation under a cooperative agreement (grant AST 08-38260) and by the CARMA partner universities (in particular NSF grant AST 0838187). S.M. gratefully acknowledges support from an NSF Astronomy and Astrophysics Fellowship. Facilities: SZA, CARMA|
|Subject Keywords:||galaxies: clusters: individual (PLCKESZ G115.71+17.52, PLCKESZ G121.11+57.01, PLCKESZ G189.84−37.24) – techniques: interferometric|
|Official Citation:||CARMA Follow-up of the Northern Unconfirmed Planck Galaxy Cluster Candidates Stephen Muchovej et al. 2012 ApJ 749 46|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||01 May 2012 18:43|
|Last Modified:||26 Dec 2012 15:08|
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