The jet of the Low Luminosity AGN of M81. Evidence of Precession
Paper in proceeding, 2013

In this contribution, we summarize our main results of a big campaign of global VLBI observations of the AGN in M81 (M81*) phase-referenced to the radio supernova SN 1993J. Thanks to the precise multi-epoch and multi-frequency astrometry, we have determined the normalized core-shift of the relativistic jet of M81* and estimated both the magnetic field and the particle density at the jet base. We have also found evidence of jet precession in M81* coming from the systematic time evolution of the jet orientation correlated with changes in the overall flux density.


Antxon Alberdi

Institute of Astrophysics of Andalusia (IAA)

Ivan Marti-Vidal

Chalmers, Earth and Space Sciences, Onsala Space Observatory

J. M. Marcaide

Universitat de Valencia

J. C. Guirado

Universitat de Valencia

Miguel Angel Perez-Torres

Institute of Astrophysics of Andalusia (IAA)

Eduardo Ros

Max Planck Society

Universitat de Valencia

Andreas Brunthaler

Max Planck Society

EPJ Web of Conferences

21016275 (ISSN) 2100014X (eISSN)

Vol. 61 08002

International Symposium on the Innermost Regions of Relativistic Jets and Their Magnetic Fields
Granada, Spain,

Subject Categories

Astronomy, Astrophysics and Cosmology


Basic sciences


Onsala Space Observatory



More information

Latest update

4/1/2021 1