Nicole Hasler, Esra Bulbul, Massimiliano Bonamente, John E. Carlstrom, Thomas L. Culverhouse, Megan Gralla, Christopher Greer, David Hawkins, Ryan Hennessy, Marshall Joy, Jeffery Kolodziejczak, James W. Lamb, David Landry, Erik M. Leitch, Adam Mantz, Daniel P. Marrone, Amber Miller, Tony Mroczkowski, Stephen Muchovej, Thomas Plagge, Clem Pryke, David Woody
We perform a joint analysis of X-ray and Sunyaev Zel'dovich (SZ) 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-Ael'dovich Array for two clusters,
Abell 2631 and Abell 2204.
View original:
http://arxiv.org/abs/1202.2411
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