AAS 207th Meeting, 8-12 January 2006
Session 22 Evolution of Galaxies, Galaxies Surveys I
Poster, Monday, 9:20am-7:00pm, January 9, 2006, Exhibit Hall

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[22.02] The Space Telescope A901/902 Galaxy Evolution Survey (STAGES): probing environmental drivers of galaxy evolution with HST

C. Y. Peng (STScI), M. E. Gray (Nottingham), D. J. Bacon (Edingburgh), M. L. Balogh (Waterloo), M. Barden (MPIA), F. D. Barazza (U. T. Austin), E. F. Bell (MPIA), J. A. R. Caldwell (U. T. Austin), B. Haeussler (MPIA), C. Heymans (UBC), K. Jahnke (MPIA), S. Jogee (U. T. Austin), S. Koposov (MPIA), K. Lane (Nottingham), D. McIntosh (U. Mass.), K. Meisenheimer, H.-W. Rix (MPIA), S. F. Sanchez (CAHA), R. Somerville (MPIA), A. N. Taylor (Edinburgh), L. Wisotzki (AIP), C. Wolf (Oxford), X. Zheng (MPIA), STAGES Collaboration

We introduce the Space Telescope A901/902 Galaxy Evolution Survey (STAGES, PI: M. E. Gray): a large ground- and space-based observational project to map the environment and galaxy properties of the A901/902 supercluster. Our mosaic of 80 ACS images obtained with the Hubble Space telescope in Cycle 13 spans a 0.5x0.5 degree region from the 17-passband COMBO-17 photometric redshift survey, encompassing a complex structure at z=0.17. With an extensive existing multi-wavelength dataset, we will probe the dependence of galaxy morphologies, star formation properties, and degree of AGN activity on local and large-scale environment. We can accurately separate the many layers composing the supercluster: the distributions of dark matter revealed by weak lensing maps; the hot intracluster medium from deep XMM-Newton imaging; and the local galaxy density using precision photometric redshifts from COMBO-17. The synthesis of these observations will provide an exceptional laboratory with which to address the influences of dark matter, hot X-ray gas, and galaxy-galaxy interactions on the evolution of the structural, spectral, and photometric properties of galaxies across a large dynamic range of environments from near-field densities to cluster cores.

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