University Of Arizona Astronomy

The University of Arizona in Tucson Arizona

Event:		"The X-ray View of Radio-Loud Active Galaxies"
Event Date/Time:		April 3, 2003 4:00 pm
Location:		Steward Observatory Room N210
Speaker:		Dr. Rita Sambruna
Institution:		George Mason University, Physics and Astronomy
Subject(s):		Steward/NOAO Colloquium
Contact:		Jill Bechtold email: jill@as.arizona.edu phone: 520-621-6533
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Event Description Posted: October 17, 2002 11:37 am		<><><><><><><><><><><><><><><><><><><><><><><><><><><> NOAO/KPNO - NSO, DEPARTMENT OF ASTRONOMY AND STEWARD OBSERVATORY AND NRAO <><><><><><><><><><><><><><><><><><><><><><><><><><><> The University of Arizona JOINT COLLOQUIUM DR. RITA SAMBRUNA George Mason University Physics and Astronomy Title: "The X-ray View of Radio-Loud Active Galaxies" Abstract: According to current unification schemes, radio-loud Active Galactic Nuclei (AGN) are powered by accretion of the interstellar gas onto a supermassive central black hole. Somehow during this process, a powerful relativistic jet is also created, which transports energy extracted from the black hole to the kpc-scale radio lobes. The origin and physical properties of jets, as well as the structure of the accretion flow in their hosts, are still poorly known. The X-ray emisison, originating in the innermost, hottest parts of the accretion flow, is a powerful tool to probe the nature of accretion in these systems. I will present recent results from our X-ray and multiwavelength observations of radio-loud AGN with Chandra, XMM-Newton, and HST. I will concentrate on the following two complementary areas: a) the origin of the high-energy emission and b) the structure of the accretion flow in radio-loud AGN. (This work funded by NASA and NSF through various grants.) Thursday, April 3, 2003 4:00 p.m. Steward Observatory Lecture Hall - Room N210 Refreshments at 3:30PM in the Lobby