Title: Rapid Gamma Ray Flaring in Active Galactic Nuclei
Speaker: Prof. Wei Cui
Affiliation: Department of Physics, Purdue University
Time: Aug 17, 2012 (Friday) 9:30 a.m.
Venue: Meeting Room 401 (Main Building)
Abstract:
Gamma-ray emitting active galactic nuclei (AGN) are characterized by variability on a wide range of timescales across nearly
the entire electromagnetic spectrum. This is an indication of the dominant role that the jet plays in radiation production.
The variability provides a valuable tool to study, in a relatively modelindependent way, the emission processes and geometry
as well as the energetics of the jet in AGN, not so different from the study of gamma ray bursts. In this talk, I will show
recent discoveries of rapid gamma-ray flaring in blazars and discuss the challenges the phenomenon presents to
our theoretical understanding of very-high-energy gamma ray production in the jet of AGN.
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