NOAO >   Observing Info >   Approved Programs >   2012A-0256

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Proposal Information for 2012A-0256


PI: Sylvain Veilleux, University of Maryland, veilleux@astro.umd.edu
Address: Astronomy Department, Stadium Drive, College Park, Maryland 20742, USA

CoI: David S. N. Rupke, Rhodes College
CoI: Stacy Teng, NASA Goddard Space Flight Center
CoI: Margaret Trippe, University of Maryland, College Park
CoI: Krista Smith, University of Maryland, College Park
CoI: Kory Kreimeyer, University of Maryland, College Park
CoI: Eckhard Sturm, MPE

Title: Neutral Winds in Local Quasar-Dominated Mergers

Abstract: The role of galactic winds in gas-rich mergers is of crucial importance to understand galaxy and supermassive black hole evolution. In the past year, our group has discovered powerful neutral and molecular winds in several ULIRGs and quasars. These outflows may be the long-sought ``smoking gun" of quasar mechanical feedback purported to transform gas-rich mergers into red and dead spheroids. We have on- going \em Herschel, \em HST, and GBT programs to follow up on these results, but none of them will map the winds on the critical galactic scale (~1-20\arcsec). We propose deep long-slit Na I (lambda)(lambda)5890, 5896 spectroscopy to address this weakness. We already have high-S/N Na I spectroscopy of all starburst-dominated mergers in our sample; here we propose to do the quasar-dominated systems. We will look for trends between the basic measured properties of the neutral gas probed by the Na I doublet (incidence of absorption, kinematics, column densities) and host/evolutionary indicators. Measured velocities in excess of ~1000 km/s or inferred mass outflow rates much larger than the star formation rates would be telltale signs of AGN-driven winds.


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