TY - JOUR
T1 - Application of a self-similar pressure profile to sunyaev-zel'dovich effect data from galaxy clusters
AU - Mroczkowski, Tony
AU - Bonamente, Max
AU - Carlstrom, John E.
AU - Culverhouse, Thomas L.
AU - Greer, Christopher
AU - Hawkins, David
AU - Hennessy, Ryan
AU - Joy, Marshall
AU - Lamb, James W.
AU - Leitch, Erik M.
AU - Loh, Michael
AU - Maughan, Ben
AU - Marrone, Daniel P.
AU - Miller, Amber
AU - Muchovej, Stephen
AU - Nagai, Daisuke
AU - Pryke, Clem
AU - Sharp, Matthew
AU - Woody, David
PY - 2009
Y1 - 2009
N2 - We 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.
AB - We 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.
KW - Cosmology: observations
KW - X-rays: galaxies: clusters
UR - https://www.scopus.com/pages/publications/67651137564
UR - https://www.scopus.com/pages/publications/67651137564#tab=citedBy
U2 - 10.1088/0004-637X/694/2/1034
DO - 10.1088/0004-637X/694/2/1034
M3 - Article
AN - SCOPUS:67651137564
SN - 0004-637X
VL - 694
SP - 1034
EP - 1044
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
ER -