The jet of the Low Luminosity AGN of M81. Evidence of Precession
Other conference contribution, 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.
Author
Antxon Alberdi
CSIC - Instituto de Astrofísica de Andalucía (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
CSIC - Instituto de Astrofísica de Andalucía (IAA)
Eduardo Ros
Universitat de ValEncia
Max Planck Institut fur Radioastronomie
Andreas Brunthaler
Max Planck Institut fur Radioastronomie
EPJ Web of Conferences
21016275 (ISSN) 2100014X (eISSN)
Vol. 61 08002Subject Categories (SSIF 2011)
Astronomy, Astrophysics and Cosmology
Roots
Basic sciences
Infrastructure
Onsala Space Observatory
DOI
10.1051/epjconf/20136108002