This is a talk held during the regular colloquium series (usually Tuesdays at 4pm).
When a star falls sufficiently close to a supermassive black hole, it is disrupted by the enormous tidal forces and then the debris feeds a sudden burst of accretion.
We can now map the stars in the Milky Way on truly galactic scales, thanks to recent surveys that are reaching across the disk, such as APOGEE, GALAH, K2, and Gaia.
The Observations of Redshift Evolution in Large Scale Environments (ORELSE) Survey is a systematic photometric and spectroscopic search for structure on scales > 10 Mpc around 18 known clusters at 0.6 < z < 1.3. The survey covers 5 square degrees, all targeted at high-density regions, m
Galaxy formation is a field currently overwhelmed by data, from large surveys to cosmological simulations. As the simulations continue to improve their matches to the observations, some have been left wondering whether the basic picture of galaxy evolution is settled.