NOAO >   Observing Info >   Approved Programs >   2010B-0218

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Proposal Information for 2010B-0218


PI: D. Michael Crenshaw, Georgia State University, crenshaw@chara.gsu.edu
Address: Department of Physics and Astronomy, One Park Place South, SE, Suite 700, Atlanta, GA 30303, USA

CoI: Thaisa Storchi-Bergmann, Universidade Federal do Rio Grande do Sul, Brazil
CoI: Steven B. Kraemer, The Catholic University of America
CoI: Henrique Schmitt, Naval Research Laboratory
CoI: Rogemar Andre Riffel, Universidade Federal de Santa Maria, Brazil
CoI: Travis Cody Fischer, Georgia State University

Title: The Connection Between Fueling Flows and Outflows in Active Galaxies: Ionized Spirals in Markarian 573

Abstract: \it HST images of the Seyfert 2 galaxy Mrk 573 show ionized arcs in its extended narrow-line region (ENLR), and an \it HST STIS long- slit spectrum indicates that much of the ionized gas is outflowing. Our geometric and kinematic models confirm that the arcs are due to nuclear dust spirals in a kpc-scale disk that are crossing into the ionizing bicone from the central AGN. indicating an intimate connection between the outflows of ionized gas and fueling flows in the form of dust spirals. However, the high radial velocities of the gas at distances > 2'' (~700 pc) do not fit our simple outflow model, and we have suggested that they could be due to rotation, albeit with unusually large amplitudes, or to in situ acceleration of the clouds off the original fueling flow by radiation pressure and/or entrainment in a highly-ionized wind. We can distinguish between these possibilities, and thereby investigate the connection between feeding and feedback in this active galaxy, by obtaining a full kinematic map of the ionized and molecular gas in the circumnuclear regions of Mrk 573 with \it Gemini North and NIFS.


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



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