Baryons and Dark Matter in Hubble Treasury Clusters

The distribution of dark matter, baryons, and stars in a cluster gravitationalpotential is a fundamental prediction of largescale structure formation. Wehave 524 orbits of HST imaging together with Subaru and VLT spectroscopy tomeasure the strong and weak lensing properties of 20 relaxed and 5highmagnification galaxy clusters (z 0.18 0.90, Tgas > 5 keV). Observingthe last 3 relaxed clusters with good visibility lacking XMM data will permituniform joint Xray/lensing/SZ analysis for 17 of the relaxed systems to advanceour understanding of the shapes and concentrations of the mass profiles,providing precise observational benchmarks for baryonic and dark matterdistributions over a range of redshifts. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]