Jet Kinematics of AGNs at High Radio Frequencies

Details Jet Kinematics of AGNs at High Radio Frequencies Jet Kinematics of AGNs at High Radio Frequencies

Jul 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..350..149j&link_type=abstract

Blazar Variability Workshop II: Entering the GLAST Era ASP Conference Series, Vol. 350, Proceedings of the Conference Held 10-12

Astronomy and Astrophysics

Astronomy

3

Scientific paper

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. The Lorentz factors of the jet flows in the different blazars range from Γ˜ 5 to 40. The quasars in our sample have similar opening angles and marginally smaller viewing angles than the BL Lacs. The radio galaxies have lower Lorentz factors and wider viewing angles than the blazars.

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