O.M. Stewart Colloquium Series

Monday, February 6, 2017 4:00pm

120 Physics Building


Dr. Vivian U, University of CA – Riverside/Irvine presents, "Gas Flows: from Black Holes to Galaxies," Monday, Feb 6 at 4 p.m.

Dr. Vivian U

The tight correlations between black hole mass and the bulge properties of its host galaxy suggest that black holes and their hosts coevolve. However, the drastically different size and mass scales of these two structures make a physical explanation of the correlation challenging. Gas plays a prominent role in galaxy evolution by fueling supermassive black holes and star formation; feedback processes quench activity by heating or removing the gas.

Tracing nuclear gas kinematics at small scales presents the most direct way to examine the feeding and feedback associated with massive black holes, particularly in the luminous regime where mass accretion is happening most rapidly. In this talk, Dr. U will present her team's ongoing efforts to explore the broad line region structure and dynamics in luminous Seyfert galaxies using reverberation mapping in a new campaign of the Lick AGN Monitoring Project. She will also discuss results from the Keck OSIRIS AO LIRGs Analysis (KOALA) Survey that highlight the properties of molecular outflows driven by AGN and starbursts at the heart of nearby luminous infrared galaxies. She will demonstrate the power of near-infrared diagnostics of shocks associated with nuclear winds that will become indispensable for understanding the interstellar medium as we enter an exciting era of astronomy with the imminence of JWST, 30-meter class telescopes, and beyond.