Jet precession in the active nucleus of M81. Ongoing VLBI monitoring
Paper in proceeding, 2012

In a recent publication, we reported results of a multi-frequency VLBI campaign of observations of the Active Galactic Nucleus (AGN) in galaxy M\,81, phase-referenced to the supernova SN\,1993J. We were able to extract precise information on the relative astrometry of the AGN radio emission at different epochs and frequencies. We found strong evidence of precession in the AGN jet (i.e., a systematic evolution in the jet inclination at each frequency) coupled to changes in the overall flux density at the different frequencies. In these proceedings, we summarise the main contents of our previous publication and we report on (preliminary) new results from our follow-up VLBI observations, now phase-referenced to the young supernova SN2008iz. We also briefly discuss how these results match the picture of our previously-reported precession model.


Ivan Marti-Vidal

Chalmers, Earth and Space Sciences, Onsala Space Observatory

Jon Marcaide

Universitat de Valencia

Antxon Alberdi

Institute of Astrophysics of Andalusia (IAA)

Andreas Brunthaler

Max-Planck Institute for Radio Astronomy

Proceedings of Science

18248039 (eISSN)

Vol. 2012-October

1th European VLBI Network Symposium and Users Meeting, EVN Symposium 2012
Bordeaux, France,

Subject Categories

Astronomy, Astrophysics and Cosmology


Basic sciences


Onsala Space Observatory

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