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Observations of High-Redshift X-Ray Selected Clusters with the Sunyaev-Zel'dovich Array

Muchovej, Stephen and Mroczkowski, Tony and Carlstrom, John E. and Cartwright, John and Greer, Christopher and Hennessy, Ryan and Loh, Michael and Pryke, Clem and Reddall, Ben and Runyan, Marcus and Sharp, Matthew and Hawkins, David and Lamb, James W. and Woody, David and Joy, Marshall and Leitch, Erik M. and Miller, Amber D. (2007) Observations of High-Redshift X-Ray Selected Clusters with the Sunyaev-Zel'dovich Array. Astrophysical Journal, 663 (2). pp. 708-716. ISSN 0004-637X. doi:10.1086/511971.

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We report measurements of the Sunyaev-Zel'dovich (SZ) effect in three high-redshift (0.89 ≤ z ≤ 1.03), X-ray selected galaxy clusters. The observations were obtained at 30 GHz during the commissioning period of a new, eight-element interferometer—the Sunyaev-Zel'dovich Array (SZA)—built for dedicated SZ effect observations. The SZA observations are sensitive to angular scales larger than those subtended by the virial radii of the clusters. Assuming isothermality and hydrostatic equilibrium for the intracluster medium and gas-mass fractions consistent with those for clusters at moderate redshift, we calculate electron temperatures, gas masses, and total cluster masses from the SZ data. The SZ-derived masses, integrated approximately to the virial radii, are 1.9^(+0.5)_(-0.4) × 10^(14) M_☉ for Cl J1415.1+3612, 3.4^(+0.6)_(-0.5) × 10^(14) M_☉ for Cl J1429.0+4241, and 7.2^(+1.3)_(-0.9) × 10^(14) M_☉ for Cl J1226.9+3332. The SZ-derived quantities are in good agreement with the cluster properties derived from X-ray measurements.

Item Type:Article
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URLURL TypeDescription
Mroczkowski, Tony0000-0003-3816-5372
Carlstrom, John E.0000-0002-2044-7665
Greer, Christopher0000-0002-9590-0508
Additional Information:© 2007 American Astronomical Society. Received 2006 October 5; accepted 2006 December 14. This paper is dedicated to the memory and spirit of James S. McDonnell. We gratefully acknowledge and thank the James S. McDonnell Foundation for their generous support of the SZA through a McDonnell Centennial Fellowship to J. E. C. This support was critical to the development and construction of the array. We also thank the NSF Division of Astronomical Sciences for support through grants AST 00-96913 and AST 06-04982 to the construction and continued operation of the SZA, and we thank the University of Chicago for its generous matching funds to the initial NSFAST grant.We thank the Kavli Institute of Cosmological Physics (KICP) for support provided by its NSF Physics Frontier Center grant PHY 01-14422 to expand the SZA from six to eight telescopes and to outfit the array with 90 GHz receivers. We are also grateful for the intellectual support of the KICP’s members and visitors. We acknowledge the David and Lucile Packard Foundation for support of the precursor SZ research using the OVRO and BIMA arrays, as well as partial support for the SZA construction. This work is also supported in part by NSF AST 05-07545 and NSF AST 05-07161 awarded to Columbia. C. G., S.M., andM. S. acknowledge support from NSF Graduate Research Fellowships. M. R. acknowledges support froma Fermi Fellowship from the Enrico Fermi Institute at the University of Chicago. A. M. gratefully acknowledges the generous support of the Alfred P. Sloan Foundation. S. M. thanks R. Rodriguez, M. Teyssier, and J. Donovan for insightful discussions.We thank the staff of the Owens Valley Radio Observatory for their outstanding support, and the Radio Astronomy Laboratories at U.C. Berkeley andUMass for providing critical components. Finally, we thank M. Bonamente, B.Maughan, R. Plambeck, and A. Stanford for their helpful discussions and suggestions on this work.
Funding AgencyGrant Number
James S. McDonnell FoundationUNSPECIFIED
NSFAST 00-96913
NSFAST 06-04982
University of ChicagoUNSPECIFIED
Kavli Institute of Cosmological Physics (KICP)UNSPECIFIED
NSFPHY 01-14422
David and Lucile Packard FoundationUNSPECIFIED
NSFAST 05-07545
NSFAST 05-07161
NSF Graduate Research FellowshipUNSPECIFIED
Enrico Fermi Institute at the University of ChicagoUNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Subject Keywords:cosmic microwave background; cosmology: observations; galaxies: clusters: individual (Cl J1226.9+3332, Cl J1226.9+3332, Cl J1415.1+3612, Cl J1415.1+3612, Cl J1429.0+4241, Cl J1429.0+4241); galaxies: individual (NGC 5529, NGC 5529); techniques: interferometric
Issue or Number:2
Record Number:CaltechAUTHORS:20100419-141045535
Persistent URL:
Official Citation:Stephen Muchovej et al 2007 ApJ 663 708 doi: 10.1086/511971
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:18019
Deposited By: Jason Perez
Deposited On:20 Apr 2010 18:19
Last Modified:08 Nov 2021 23:40

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