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Evolution of the parsec-scale jet in 3C 345

Published online by Cambridge University Press:  24 February 2011

F. K. Schinzel ,
A. P. Lobanov ,
J. A. Zensus ,
G. B. Taylor ,
S. Jorstad  and
A. Marscher
F. K. Schinzel
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany email: schinzel@mpifr.de
A. P. Lobanov
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany email: schinzel@mpifr.de
J. A. Zensus
Affiliation:
Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany email: schinzel@mpifr.de
G. B. Taylor
Affiliation:
Dept. of Physics & Astronomy, University of New Mexico, Albuquerque NM, 87131, USA
S. Jorstad
Affiliation:
Institute for Astrophysical Research, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA
A. Marscher
Affiliation:
Institute for Astrophysical Research, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA
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Abstract

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The 16m quasar 3C 345 is one of the best examples of an AGN showing structural and flux variability on parsec scales around a compact unresolved radio core. It has been observed from radio to γ-ray wavebands with a special focus on Very Long Baseline Interferometry (VLBI) observations in the range 1-100 GHz that cover a period of over 30 years. The complex pc-scale jet of 3C 345 exemplifies an archetypal “superluminal” jet with helical substructure. Existing VLBI observations of 3C 345 form an unprecedented database enabling a unique insight into the long-term evolution of the pc-scale radio emission. Here we present the latest results from our ongoing long-term VLBI monitoring of 3C 345, focusing on the morphological, kinematic, and spectral evolution of the pc-scale jet. Special attention will be given to the recent onset of a new period of high activity in the source that has been manifesting itself since 2008 from radio through γ-rays. Recent VLBI and high energy observations to study the relation between the radio emission and the production of high energy photons in 3C 345 are combined.

Keywords

galaxies: activequasars: individual (3C 345)galaxies: jets
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S275: Jets at all Scales , September 2010 , pp. 196 - 197
Copyright
Copyright © International Astronomical Union 2011

References

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