AAS 200th meeting, Albuquerque, NM, June 2002
Session 51. The New Radio Universe
Topical Session Oral, Wednesday, June 5, 2002, 8:30-10:00am, 10:45am-12:30pm, 2:30-4:00pm, 4:15-6:00pm, Ballroom C

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[51.06] Active Galactic Nuclei in Nearby Galaxies

H. Falcke, S. Markoff, F. Yuan (MPIfR Bonn), N. Nagar (Arcetri Observatory), A.S. Wilson (University of Maryland), G.C. Bower (UC Berkeley)

A large fraction of nearby Galaxies, including our own, show evidence for low-level activity associated with accretion onto a supermassive black hole. This allows one to study black hole physics at accretion rates significantly below those inferred for quasars and Seyfert galaxies. A major issue is whether the mode of accretion changes when going to sub-Eddington luminosities. Interestingly, radio surveys of Low-Luminosity AGN (LLAGN) find a high number of compact radio cores with flat spectra and high brightness temperatures. These are similar to those in radio loud quasars, albeit at a much lower luminosity. In the optical, on the other hand, LLAGN look markedly different from quasars and Seyfert, with relatively faint optical/UV continuum emission. One can model the overall spectral energy distribution of LLAGN from radio to X-rays with a combination of jet-like outflows and optically thin accretion flows. Data and models suggest that the overall appearance of black holes becomes increasingly jet-dominated as one decreases the accretion rate. Hence, radio will be a prime method for studying these kind of AGN. In addition, because of the proximity of LLAGN, the next generation radio telescopes (EVLA, SKA, ALMA + VLBI) will be able to approach the event horizon of the central black holes. Using the LLAGN as a reference point, one can also make proper motion studies of entire galaxies within a few Mpc.

If you would like more information about this abstract, please follow the link to http://www.mpifr-bonn.mpg.de/staff/hfalcke/publications.html. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: hfalcke@mpifr-bonn.mpg.de

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Bulletin of the American Astronomical Society, 34
© 2002. The American Astronomical Soceity.