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Scaling relations from Sunyaev-Zel'dovich effect and Chandra X-ray measurements of high-redshift galaxy clusters

Bonamente, Massimiliano and Marshall, Joy and LaRoque, Samuel J. and Carlstrom, John E. and Nagai, Daisuke and Marrone, Daniel P. (2008) Scaling relations from Sunyaev-Zel'dovich effect and Chandra X-ray measurements of high-redshift galaxy clusters. Astrophysical Journal, 675 (1). pp. 106-114. ISSN 0004-637X.

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We present Sunyaev-Zel'dovich Effect (SZE) scaling relations for 38 massive galaxy clusters at redshifts 0.14 ≤ z≤ 0.89, observed with both the Chandra X-ray Observatory and the centimeter-wave SZE imaging system at the BIMA and OVRO interferometric arrays. An isothermal β-model with the central 100 kpc excluded from the X-ray data is used to model the intracluster medium and to measure global cluster properties. For each cluster, we measure the X-ray spectroscopic temperature, SZE gas mass, total mass, and integrated Compton y-parameters within r2500. Our measurements are in agreement with the expectations based on a simple self-similar model of cluster formation and evolution. We compare the cluster properties derived from our SZE observations with and without Chandra spatial and spectral information and find them to be in good agreement. We compare our results with cosmological numerical simulations and find that simulations that include radiative cooling, star formation, and feedback match well both the slope and normalization of our SZE scaling relations.

Item Type:Article
Related URLs:
URLURL TypeDescription
Carlstrom, John E.0000-0002-2044-7665
Nagai, Daisuke0000-0002-6766-5942
Marrone, Daniel P.0000-0002-2367-1080
Additional Information:© 2008. The American Astronomical Society. Received 2007 August 3; accepted 2007 November 2. This work was made possible by the skill and dedication of Leon van Speybroeck and his colleagues on the Chandra project, who constructed an exceptional observatory and obtained deep X-ray observations for a large sample of galaxy clusters. We thank E. Leitch and the anonymous referee for excellent suggestions on the manuscript. The support of the BIMA and OVRO staff over many years is also gratefully acknowledged, including J. R. Forster, C. Giovanine, R. Lawrence, S. Padin, R. Plambeck, S. Scott, and D. Woody. We thank C. Alexander, K. Coble, A. Cooray, K. Dawson, L. Grego, G. Holder, W. Holzapfel, A. Miller, J. Mohr, S. Patel, E. Reese, and P. Whitehouse for their outstanding contributions to the SZE instrumentation, observations, and analysis. This work was supported in part by NSF grants AST 00-96913 and AST 06-04982 and by the KICP NSF Physics Frontier Center grant PHY 01-14422. Research at the Owens Valley Radio Observatory and the Berkeley-Illinois-Maryland Array was supported by National Science Foundation grants AST 99-81546 and 02-28963. Calculations were performed at the Space Plasma Interactive Data Analysis and Simulation Laboratory at the Center for Space Plasma and Aeronomy Research of the University of Alabama at Huntsville. D. N. is supported by the Sherman Fairchild Postdoctoral Fellowship at Caltech. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.
Funding AgencyGrant Number
NSFAST 00-96913
NSFAST 06-04982
NSFAST 99-81546
NSFAST 02-28963
NSFPHY 01-14422
Sherman Fairchild FoundationUNSPECIFIED
Subject Keywords:galaxies : clusters : general
Issue or Number:1
Record Number:CaltechAUTHORS:20090407-101728774
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:13867
Deposited By: Ruth Sustaita
Deposited On:16 Jul 2009 17:16
Last Modified:20 Nov 2019 22:26

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