Published April 1, 2012 | Version v1
Journal article Metadata-only

JOINT ANALYSIS OF X-RAY AND SUNYAEV-ZEL'DOVICH OBSERVATIONS OF GALAXY CLUSTERS USING AN ANALYTIC MODEL OF THE INTRACLUSTER MEDIUM

Creators

  • 1. Department of Physics, University of Alabama, Huntsville, AL 35899 (United States)
  • 2. Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637 (United States)
  • 3. Owens Valley Radio Observatory, California Institute of Technology, Big Pine, CA 93513 (United States)
  • 4. Space Science-VP62, NASA Marshall Space Flight Center, Huntsville, AL 35812 (United States)
  • 5. Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027 (United States)
  • 6. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104 (United States)

Description

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.

Availability note (English)

Available from http://dx.doi.org/10.1088/0004-637X/748/2/113

Additional details

Identifiers

DOI
10.1088/0004-637X/748/2/113;

Publishing Information

Journal Title
Astrophysical Journal
Journal Volume
748
Journal Issue
2
Journal Page Range
[12 p.]
ISSN
0004-637X
CODEN
ASJOAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
43103194
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
GALACTIC EVOLUTION; GALAXY CLUSTERS; MASS; NOISE; RED SHIFT; SIGNALS; X RADIATION; X-RAY GALAXIES
Descriptors DEC
COSMIC RAY SOURCES; COSMIC X-RAY SOURCES; ELECTROMAGNETIC RADIATION; EVOLUTION; GALAXIES; IONIZING RADIATIONS; RADIATIONS