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Application of a Self-Similar Pressure Profile to Sunyaev-Zeldovich Effect Data from Galaxy ClustersWe investigate the utility of a new, self-similar pressure profile for fitting Sunyaev-Zel'dovich (SZ) effect observations of galaxy clusters. Current SZ imaging instruments-such as the Sunyaev-Zel'dovich Array (SZA)- are capable of probing clusters over a large range in a physical scale. A model is therefore required that can accurately describe a cluster's pressure profile over a broad range of radii from the core of the cluster out to a significant fraction of the virial radius. In the analysis presented here, we fit a radial pressure profile derived from simulations and detailed X-ray analysis of relaxed clusters to SZA observations of three clusters with exceptionally high-quality X-ray data: A1835, A1914, and CL J1226.9+3332. From the joint analysis of the SZ and X-ray data, we derive physical properties such as gas mass, total mass, gas fraction and the intrinsic, integrated Compton y-parameter. We find that parameters derived from the joint fit to the SZ and X-ray data agree well with a detailed, independent X-ray-only analysis of the same clusters. In particular, we find that, when combined with X-ray imaging data, this new pressure profile yields an independent electron radial temperature profile that is in good agreement with spectroscopic X-ray measurements.
Document ID
20100002194
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Mroczkowski, Tony
(Columbia Univ. New York, NY, United States)
Bonamente, Max
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Carlstrom, John E.
(Chicago Univ. Chicago, IL, United States)
Culverhouse, Thomas L.
(Chicago Univ. Chicago, IL, United States)
Greer, Christopher
(Chicago Univ. Chicago, IL, United States)
Hawkins, David
(California Inst. of Tech. Big Pine, CA, United States)
Hennessy, Ryan
(Chicago Univ. Chicago, IL, United States)
Joy, Marshall
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Lamb, James W.
(California Inst. of Tech. Big Pine, CA, United States)
Leitch, Erik M.
(Chicago Univ. Chicago, IL, United States)
Loh, Michael
(Chicago Univ. Chicago, IL, United States)
Maughan, Ben
(Bristol Univ. United Kingdom)
Marrone, Daniel P.
(Chicago Univ. Chicago, IL, United States)
Miller, Amber
(Columbia Univ. New York, NY, United States)
Muchovej, Stephen
(Columbia Univ. New York, NY, United States)
Nagai, Daisuke
(Yale Univ. Observatory New Haven, CT, United States)
Pryke, Clem
(Chicago Univ. Chicago, IL, United States)
Sharp, Matthew
(Chicago Univ. Chicago, IL, United States)
Woody, David
(California Inst. of Tech. Big Pine, CA, United States)
Date Acquired
August 25, 2013
Publication Date
April 1, 2009
Publication Information
Publication: The Astrophysical Journal
Publisher: American Astronomical Society
Volume: 694
Subject Category
Astronomy
Report/Patent Number
M09-0071
Funding Number(s)
CONTRACT_GRANT: NSF AST-0604982
CONTRACT_GRANT: NSF AST-05-07161
CONTRACT_GRANT: NSF AST-0507545
CONTRACT_GRANT: NSF PHY-0114422
Distribution Limits
Public
Copyright
Other

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