NOAO >   Observing Info >   Approved Programs >   2011B-0438

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Proposal Information for 2011B-0438


PI: David Rupke, Rhodes College, drupke@gmail.com
Address: Department of Physics, 2000 N. Parkway, Memphis, TN 38112, USA

CoI: Sylvain Veilleux, University of Maryland
CoI: Kory Kreimeyer, University of Maryland

Title: Looking for QSO Feedback: Two's a Company, Three's a Crowd

Abstract: We have recently discovered the first unambiguous evidence for QSO- mode feedback in a galaxy merger. 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 Mrk 231 have finally revealed a massive, wide-angle, kiloparsec-scale outflow that is clearly powered by the QSO and is removing large amounts of gas from the center of the galaxy. Here, we propose to use the Gemini IFUs to study outflows in two more QSOs in the late stages of a major merger. This is part of a larger, ongoing program to study the structure and power source of winds in merging galaxies. However, to date we have observed only one unobscured AGN (Mrk 231). We need to study other QSOs in order to confirm whether or not the wind observed in Mrk 231 is an outlier or is typical of such objects. Doing so will inform prescriptions of winds in numerical simulations, enabling them to greatly improve estimates of the effects of negative feedback in mergers.


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