2006ApJ...652..232H

Result. are presented from a detailed analysis of optical and X-ray observations of moderate-redshift galaxy clusters from the Canadian Network for Observational Cosmology (CNOC) subsample of the EMSS. The combination of extensive optical and deep X-ray observations of these clusters make them ideal candidates for multiwavelength mass comparison studies. X-ray surface brightness profiles of 14 clusters with 0.17<z<0.55 are constructed from Chandra observations and fit to single- and double-β models. Spatially resolved temperature analysis is performed, indicating that five of the clusters in this sample exhibit temperature gradients within their inner 60-200 kpc. Integrated spectra extracted within R₂₅₀₀provide temperature, abundance, and luminosity information. Under assumptions of hydrostatic equilibrium and spherical symmetry, we derive gas and total masses within R₂₅₀₀ and R₂₀₀. We find an average gas mass fraction of f_gas(R₂₀₀)=0.092±0.004 h^–3/2₇₀, resulting in Ω_m=0.42±0.02 (formal error). We also derive dynamical masses for these clusters to R₂₀₀. We find no systematic bias between X-ray and dynamical methods across the sample, with an average M_dyn/M_X=0.97±0.05. We also compare X-ray masses to weak-lensing mass estimates of a subset of our sample, resulting in a weighted average of M_lens/M_X of 0.99±0.07. We investigate X-ray-scaling relationships and find power-law slopes that are slightly steeper than the predictions of self-similar models, with an E(z)^–1L_X-T_Xslope of 2.4±0.2 and an E(z)M₂₅₀₀-T_Xslope of 1.7±0.1. Relationships between red-sequence optical richness (B_gc,red) and global cluster X-ray properties (T_X, L_X, and M₂₅₀₀) are also examined and fitted.