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

被引：39

作者：

Brunthaler, A

Falcke, H

Bower, GC

Aller, MF

Aller, HD

Teräsranta, H

机构：

[1] Max Planck Inst Radioastron, D-53121 Bonn, Germany

[2] Joint Inst VLBI Europe, NL-7990 AA Dwingeloo, Netherlands

[3] ASTRON, NL-7990 AA Dwingeloo, Netherlands

[4] Radboud Univ Nijmegen, Dept Astrophys, NL-6500 GL Nijmegen, Netherlands

[5] Univ Calif Berkeley, Radio Astron Lab, Berkeley, CA 94720 USA

[6] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA

[7] Helsinki Univ Technol, Metsahovi Radio Observ, Kylmala 02540, Finland

来源：

ASTRONOMY & ASTROPHYSICS | 2005年 / 435卷 / 02期

关键词：

galaxies : active; galaxies : individual : III Zw 2; galaxies : jets; galaxies : Seyfert;

D O I：

10.1051/0004-6361:20042427

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A very detailed monitoring of a radio flare in the Seyfert I galaxy IIIZw2 with the VLA and the VLBA is presented. The relative astrometry in the VLBA observations was precise to a few mu as. The spectral and spatial evolutions of the source are closely linked, and these observations allowed us to study a textbook example of a synchrotron self-absorbed jet in great detail. We observed a phase where the jet gets frustrated with neither expansion nor 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.

引用

页码：497 / 506

页数：10

共 39 条

[1] SPECTRA AND LINEAR POLARIZATIONS OF EXTRAGALACTIC VARIABLE SOURCES AT CENTIMETER WAVELENGTHS [J].