CaltechAUTHORS
Published April 1, 2012 | Version Published
Journal Article Open

Joint Analysis of X-Ray and Sunyaev-Zel'dovich Observations of Galaxy Clusters Using an Analytic Model of the Intracluster Medium

Creators

  • 1. ROR icon University of Alabama in Huntsville
  • 2. ROR icon Marshall Space Flight Center
  • 3. ROR icon University of Chicago
  • 4. ROR icon California Institute of Technology
  • 5. ROR icon Goddard Space Flight Center
  • 6. ROR icon Columbia University
  • 7. ROR icon University of Pennsylvania

Abstract

We perform a joint analysis of X-ray and Sunyaev-Zel'dovich effect data using an analytic model that describes the gas properties of galaxy clusters. The joint analysis allows the measurement of the cluster gas mass fraction profile and Hubble constant independent of cosmological parameters. Weak cosmological priors are used to calculate the overdensity radius within which the gas mass fractions are reported. Such an analysis can provide direct constraints on the evolution of the cluster gas mass fraction with redshift. We validate the model and the joint analysis on high signal-to-noise data from the Chandra X-ray Observatory and the Sunyaev-Zel'dovich Array for two clusters, A2631 and A2204.

Additional Information

© 2012 American Astronomical Society. Received 2011 April 24; accepted 2012 January 18; published 2012 March 14. The operation of the SZA is supported by the NSF through grants AST-0604982 and AST-0838187. Partial support is also provided from the grant PHY-0114422 at the University of Chicago, and by NSF grants AST-0507545 and AST-05-07161 to Columbia University. CARMA operations are supported by the NSF under a cooperative agreement, and by the CARMA partner universities. S.M. acknowledges support from an NSF Astronomy and Astrophysics Fellowship; C.G. and S.M. from NSF Graduate Research Fellowships; and D.P.M. from the NASA Hubble Fellowship grant HF-51259.01. Support for this work was provided for T.M. by NASA through the Einstein Fellowship Program, grant PF0-110077.

Attached Files

Published - Hasler2012p18027Astrophys_J.pdf

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Hasler2012p18027Astrophys_J.pdf

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Additional details

Identifiers

Eprint ID
31346
Resolver ID
CaltechAUTHORS:20120508-095414829

Funding

NSF
AST-0604982
NSF
AST-0838187
NSF
PHY-0114422
NSF
AST-0507545
NSF
AST-05-07161
CARMA partner universities
NSF Astronomy and Astrophysics Fellowship
NASA Hubble Fellowship
HF-51259.01
NASA Einstein Fellowship
PF0-110077

Dates

Created
2012-05-08
Created from EPrint's datestamp field
Updated
2021-11-09
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
Physics Department