The jet of the Low Luminosity AGN of M81 Evidence of Precession

被引：4
|
作者：
Alberdi, A. [1 ]
Marti-Vidal, I. [2 ]
Marcaide, J. M. [3 ]
Guirado, J. C. [3 ,4 ]
Perez-Torres, M. A. [1 ]
Ros, E. [3 ,4 ,5 ]
Brunthaler, A. [5 ]
机构：
[1] Inst Astrofis Andalucia IAA CSIC, POB 3004, Granada 18008, Spain
[2] Onsala Space Observ, ALMA Reg Ctr, SE-43992 Onsala, Sweden
[3] Univ Valencia, Dept Astron & Astrofis, E-46100 Burjassot, Spain
[4] Univ Valencia, Astron Observ, E-46980 Valencia, Spain
[5] Max Planck Inst Radioastron, D-53121 Bonn, Germany
来源：
INNERMOST REGIONS OF RELATIVISTIC JETS AND THEIR MAGNETIC FIELDS | 2013年 / 61卷
关键词：
ACTIVE NUCLEUS; DISCOVERY; VLBI;
D O I：
10.1051/epjconf/20136108002
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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.
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页数：4
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