Assigned ID: 225 ----- Attempting Submission 1 (Thu Feb 23 22:02:01 GMT 2012) ----- HST Phase I Proposal 225 (astrostat_v1.apt) successfully submitted. ----- Attempting Submission 2 (Thu Feb 23 23:35:48 GMT 2012) ----- HST Phase I Proposal 225 (astrostat_v1.apt) successfully submitted. ----- Attempting Submission 3 (Fri Feb 24 21:37:37 GMT 2012) ----- A galaxy's morphology is an important tracer of its recent assembly history and correlates strongly with other fundamental properties such as star-formation history, kinematics, and black hole mass. Our current approaches do not fully exploit the wealth of structural information available in the deep HST images, nor do they reliably classify rare but important populations such as galaxy mergers and unstable disks at z > 1. As a result, the connections between galaxy assembly, star formation, and morphological transformation via mergers, disk instabilities, and bulge formation remain unsolved problems. Our primary goals for this Legacy Archival program are (1) to derive a rigorous statistical methodology for quantifying and classifying distant galaxy structures; (2) to apply these new astrostatistical algorithms to galaxies at 0 < z < 2.5 in the major HST extragalactic legacy fields and measure the structural evolution; (3) to measure and classify mock HST images of hydrodynamical cosmological simulations of galaxies at 0 < z < 2.5, and test these against our measurements of the real universe. This program will produce several much-needed Legacy products. With these algorithms, we will produce and publicly release high quality catalogs of optical/near-IR quantitative morphology and classifications for the HST extragalactic legacy fields. We will also provide similar catalogs for mock HST images of state-of-the-art cosmological simulations of galaxy assembly and structural evolution. Finally, we will publicly release the software for calculating our new morphology statistics and running the new galaxy classification algorithms to encourage broad use by the community. UNRESOLVED STELLAR POPULATIONS AND GALAXY STRUCTURE 12 Legacy false 0.0 0.0 false false false false SUPPORTED