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Paper: 3C 120 and the Disk-Jet Connection
Volume: 360, AGN Variability from X-Rays to Radio Waves
Page: 153
Authors: Marscher, A.P.; Jorstad, S.G.
Abstract: The radio galaxy 3C 120 continues its pattern of low X-ray flux states preceding the appearance of superluminal knots in the radio jet. The rapid variability of the X-ray flux plus the presence of an iron line indicate that the main source of X-ray emission is the accretion disk/corona. A plausible cause of the X-ray dips is a decrease in the viscosity during episodes of enhanced poloidal magnetic field. The same condition could divert extra energy into the jet, causing a shock to propagate downstream, eventually appearing as a superluminal feature.
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