AAO Colloquium. Thursday, 22nd February - 3:30pm AAO Conference Room A Quantitative Study of Peculiarities in Galaxy Morphology Dr Katherine Wu University of Florida Peculiarities in galaxy morphology are generally accepted to be indications of galaxy interactions and mergers. A study of such peculiarities, therefore, will provide valuable clues to the formation and evolution of galaxies. I have developed a pair of indices (rotational asymmetry and concentration), based on the work of R. Abraham and collaborators, to identify galaxies with peculiar morphology. These indices are applied to a large sample of galaxies in the Hubble Deep Field for which photometric redshifts have been determined by A. Connolly. This powerful combination of deep, high resolution HST data and photometric redshifts allows investigation of trends at redshifts which have been largely inaccessible until now. I will present the evolution of the distribution of galaxies in the asymmetry-concentration parameter space and discuss implications on the current views of galaxy evolution.