NOAO >   Observing Info >   Approved Programs >   2012B-0117

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Proposal Information for 2012B-0117


PI: David Rupke, Rhodes College, drupke@gmail.com
Address: 2000 N. Parkway, Memphis, TN, 38104, USA

CoI: Sylvain Veilleux, University of Maryland

Title: QSO Feedback in Action: The AGN Threshold

Abstract: We have recently discovered the first unambiguous evidence for QSO-mode feedback in galaxy mergers. Massive outflows of gas that quench star formation and regulate black hole growth in merging systems had been predicted by theory but not yet observed. GMOS/IFU observations of six nearby mergers reveal massive, wide-angle, kiloparsec-scale outflows with velocities exceeding 1000 km/s when the AGN luminosity exceeds the canonical QSO threshold. We propose to better pin down the luminosity threshold at which the AGN begins to dominate the outflow dynamics by using the GMOS IFU to observe the neutral and warm ionized phases of winds on large scales. We will compare our results to data from an extensive multiwavelength campaign of QSO winds. Through observations of QSO feedback, we can inform prescriptions of such feedback in numerical simulations, enabling theorists to greatly improve estimates of their effects in mergers.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2012B-0117

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