Jet Kinematics of AGNs at High Radio Frequencies

S.G. Jorstad, A.P. Marscher, M. Lister, A.M. Stirling, T.V. Cawthorne, J-L. Gomez, W.K. Gear, J. A. Stevens, E.I. Robson, P.S. Smith, J.R. Forster

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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We have completed a 3 yr program of polarization monitoring of 15 active galactic nuclei with the Very Long Baseline Array at 7 mm wavelength. At some epochs the images are accompanied by nearly simultaneous polarization measurements at 3 mm, 1.35/0.85 mm, and optical wavelengths. We determine apparent velocities in the jets of all sources in the sample. We suggest a new method to estimate Doppler factor of the jet components based on their VLBI properties. This allows us to derive the Lorentz factors and viewing angles of superluminal knots and opening angles of the jets.
Original languageEnglish
Title of host publicationIn: Procs of the Blazar Variability Workshop II: Entering the GLAST Era - ASP Conf Series 350
PublisherAstronomical Society of the Pacific
ISBN (Print)1-58381-218-0, 978-1-58381-284-6
Publication statusPublished - 2006


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