NOAO >   Observing Info >   Approved Programs >   2012A-0418

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Proposal Information for 2012A-0418


PI: Jeremy Mould, Swinburne University, jmould@swin.edu.au
Address: Centre for Astrophysics and Supercomputing, PO Box 218, Hawthorn, Vic 3122, Australia

CoI: Michael Brown, Monash University
CoI: Buell Jannuzi, NOAO
CoI: Peter McGregor, ANU
CoI: David Floyd, Monash University
CoI: Heath Jones, Monash University
CoI: Laura Ferrarese, NRC/HIA

Title: The dynamics and excitation of circumnuclear disks in radio-active galaxies

Abstract: Powerful radio-active galaxies may harbor a heavily obscured Active Galactic Nucleus (AGN), where the black hole is hidden by an optically and geometrically thick dust "torus". Near-IR spectroscopy with Adaptive Optics (AO) has shown that the ratio of atomic to molecular hydrogen varies greatly across the nuclear regions, thus allowing one to set limits on the size of the torus. AO IFU observations with Gemini and Keck will enable a study of a complete sample of early-type galaxies harboring radio AGNs, resulting in a complete picture of the kinematics and distribution of the gas around the nucleus, and trace the 2-D structure of the torus in these galaxies. The time is right to survey a complete sample of nearby radio-active galaxies to (1) characterize the dynamics of these circumnuclear disks as a function of galaxy mass and (2) outline the ecology of the gas flows that support them. %First we must see which of Brown et al's %complete sample of nearby radiogalaxies have emission As a first step, we need to determine which of our selected sample of 91 nearby radio-active galaxies have emission lines in J & H and are thus amenable to NIR IFU observations. This we propose to do with FLAMINGOS. To survey our sample for suitable objects for Keck/Gemini follow-up will require approximately 18 nights distributed evenly from semester 2011B through 2012B. Of these 6.5 will occur in November. With this proposal we request 6 nights in 2012A.%It will take 11 nights in 11B & 12B and


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