The extreme flare in III Zw 2: Evolution of a radio jet in a Seyfert galaxy

Details The extreme flare in III Zw 2: Evolution of a radio jet in a Seyfert galaxy The extreme flare in III Zw 2: Evolution of a radio jet in a Seyfert galaxy

2005-01-27

arxiv.org/abs/astro-ph/0501616v1

Astronomy and Astrophysics

Astrophysics

Astronomy & Astrophysics, accepted, 11 pages, 14 Figures, also available at http://www.jive.nl/~brunthal/pub.shtml

Scientific paper

A very detailed monitoring of a radio flare in the Seyfert I galaxy III Zw 2 with the VLA and the VLBA is presented. The relative astrometry in the VLBA observations was precise on a level of a few microarcseconds. Spectral and spatial evolution of the source are closely linked and these observations allowed us to study in great detail a textbook example of a synchrotron self-absorbed jet. We observe a phase where the jet gets frustrated, without expansion and no spectral evolution. Then the jet breaks free and starts to expand with apparent superluminal motion. This expansion is accompanied by a strong spectral evolution. The results are a good confirmation of synchrotron theory and equipartition for jets.

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