Computer Science
Scientific paper
Jul 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008hst..prop11560e&link_type=abstract
HST Proposal ID #11560. Cycle 17
Computer Science
Scientific paper
We propose two-filter {F555W, F814W} ACS observations of the core of Cl0016+1609, arguably the most famous massive cluster at z>0.5. The most-studied such system at all wavelengths from X-ray to radio, Cl0016+1609 has no useful multi-passband ACS images to date. Complementing the only existing ACS data {a 2x2 mosaic in the F606W passband and a snapshot of the core in the F775W passband}, the observations proposed here will provide resolved color information on both lensed background objects and cluster galaxies, thereby allowing us to measure accurately the cluster's dark-matter distribution on scales from tens to more than 500/h_50 kpc using both strong- and weak-gravitational lensing, and to study the color morphology of mergers and the star-formation history of galaxies in a high-density environment. Supported by an extensive groundbased imaging and spectroscopic campaign, as well as by deep Chandra X-ray observations, this observation completes our HST/ACS survey of the 12 most distant galaxy clusters detected in the MACS X-ray survey.;
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