PI: Jeffrey Rich, IPAC,
Address: MS 100-22, 770 SOUTH WILSON AVENUE, PASADENA, CA 91125 USA
CoI: Katherine Alatalo, Carnegie Observatories
CoI: Phil Appleton, IPAC
CoI: Lisa Kewley, Australian National U.
CoI: Mark Lacy, NRAO
CoI: Ute Lisenfeld, Universidad de Granada
CoI: Lauranne Lanz, IPAC
CoI: Anne Medling, Australian National U.
CoI: Kristina Nyland, ASTRON
Title: Quenching Caught in the Act: Measuring Feedback in Shocked Post-Starburst Galaxies
Abstract: The transition from star forming blue galaxy to extinguished red elliptical remains poorly understood. AGN may act to quench star formation by halting ongoing star formation and expelling any remaining molecular gas available for future star formation. We have begun a study to identify galaxies undergoing this transition, searching for shocked post-starburst galaxies (SPOGs). We propose to use the Gemini GMOS IFU to directly measure the feedback in these transitioning systems. We have identified several SPOG candidates that exhibit evidence for galactic winds, a mechanism that imparts direct feedback on the host galaxy. We plan to measure the mass and velocity of the neutral and ionized gas caught up in the outflow using the NaD doublet and available emission lines. We will also map the distribution, kinematics and relative strengths of the emission lines to confirm that the AGN is indeed the driver of the galactic wind in these systems by comparing our data with shock and AGN photoionization models and studying the morphology of the outflowing ionized gas. Our data will allow us to confirm whether or not AGN are acting as the driving force behind quenching in SPOGs and to measure the extent and time scale of the feedback in this transitioning population.
Program Type: Standard/Extragalactic
Run 1 (2016B): GEM-NQ/GMOSN -- 15.2hrs band 3 (GN-2016B-Q-75)
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360