(Proposal ID) S10A-019

(PI) Ho, Paul

(Proposal Title)
Structure of Dark Matter and Baryons in AMIBA SZE Galaxy Clusters (II)

(Abstract)
We propose deep BR_cz' imaging with Suprime-Cam of several hot X-ray (> 8 keV) 
clusters of galaxies for which Sunyaev-Zel'dovich effect (SZE) observations 
are underway at 3mm with the Array for Microwave Background Anisotropy (AMiBA) 
and superb resolution HST/ACS strong lensing (SL) data are readily available. 
Joint weak lensing (WL), SL, multicolor imaging, and SZE observations, 
combined with archival X-ray data, will probe in a model-independent manner 
the structure of dark matter, member galaxies, and the hot cluster gas in rich 
cluster environments. Our targets are composed of a class of the most massive 
clusters at moderate redshifts (0.2 <~ z <~ 0.7), allowing us to derive 
reliable WL shape measurements and thus accurate mass profiles out to the 
cluster virial radius. Our proposal aims to (1) map out the mass distribution 
in clusters via WL techniques, and compare with the distributions of hot and 
cold baryonic components, (2) make an accurate determination of the cluster 
mass profile from a joint WL+SL analysis, (3) derive cluster gas-mass fraction 
profiles free from the hydrostatic equilibrium assumption, and (4) examine 
directly the cluster mass vs. SZE observable relation, which will provide an 
important basis for cosmological tests with upcoming blind SZE surveys.