Joint analysis of X-ray and Sunyaev-Zel'dovich observations of galaxy clusters using an analytic model of the intracluster medium

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 PlaggeClem Pryke, David Woody

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6 Scopus citations

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.

Original languageEnglish (US)
Article number113
JournalAstrophysical Journal
Volume748
Issue number2
DOIs
StatePublished - Apr 1 2012

Keywords

  • X-rays: galaxies: clusters
  • X-rays: individuals (A2204, A2631)

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