The Innermost Regions of Relativistic Jets and Their Magnetic Fields. Granada (Spain). June 10th-14th, 2013.

Alberdi, Antxon

The jet of the LLAGN of M81: Evidence of Precession.


Author list: A. Alberdi, I. Marti-Vidal, J. M. Marcaide, A. Brunthaler, M. A. Perez-Torres, J. C. Guirado, E. Ros


We have performed a multi-frequency VLBI campaign of observations of the low-luminosity active galactic nucleus (LLAGN) in the galaxy M81. Thanks to the large amount of data available, we have been able to study with exquisite detail the stability of the AGN in the frame of the host galaxy at different frequencies, the frequency-dependent effects in the jet morphology, together with their time evolution. We have found strong evidence of precession in the jet (i.e. a systematic time evolution in the jet inclination at each frequency) associated with changes in the overall flux density at the different frequencies. We will show our last results.