Galaxy Formation Theory
My group's main research is studying how galaxies formed their stars. Past projects involved reconstructing star formation histories for all observable galaxies as a function of their halo mass and redshift, as well as making empirical connections between galaxies and their host dark matter halos. At present, we are refining these models to better model galaxies' colors, dust content, and metallicities.
Supermassive Black Hole Formation
Our group has also developed methodology for reconstructing growth histories also applies to black holes. Quasar luminosity functions combined with AGN occupation fractions and z=0 black hole mass functions provide constraints not only on black hole accretion histories but also on their typical Eddington ratios and duty cycles as a function of redshift and host galaxy mass.