My research is principally in extragalactic astronomy and observational cosmology, including

1. ✤ using strong gravitational lenses to detect the most distant galaxies and the earliest stars, measure the expansion rate of the Universe, and constrain the properties of dark matter halos
   

2. ✤ exploring the formation of galaxies and large-scale structure via the simulation and detection of Lyman-alpha emitting sources in the early Universe
   

3. ✤ making a complete inventory of the stellar and gaseous baryons in clusters and groups of galaxies to compare to the baryon budget of the Universe
   

4. ✤ surveying galaxies across environments and redshift to isolate those factors most important in driving galaxy evolution
   

5. ✤ detailing the transformation of spirals into early-type galaxies via the post-starburst phase of galaxy evolution
   

6. ✤ studying the nuclei of merging galaxies to determine the implications for black hole evolution