1245+676 - a CSO/GPS source being an extreme case of a double-double structure
Abstract
AGN with the so-called `double-double' radio structure have been interpreted as restarted AGN where the inner structure is a manifestation of a new phase of activity which happened to begin before the outer radio lobes resulting from the previous one had faded completely. The radio galaxy 1245+676 is an extreme example of such a double-double object - its outer structure, measuring 970 h^{-1} kpc, is five orders of magnitude larger than the 9.6 h^{-1} pc inner one. We present a series of VLBI observations of the core of 1245+676 which appears to be a compact symmetric object (CSO). We have detected the motion of the CSO's lobes, measured its velocity, and inferred the kinematic age of that structure.
Keywords
Cite
@article{arxiv.astro-ph/0209212,
title = {1245+676 - a CSO/GPS source being an extreme case of a double-double structure},
author = {Andrzej Marecki and Peter D. Barthel and Antonis Polatidis and Izabela Owsianik},
journal= {arXiv preprint arXiv:astro-ph/0209212},
year = {2009}
}
Comments
A contribution to The Third Workshop on Compact Steep Spectrum and GHz-Peaked Spectrum Radio Sources, Kerastari, Greece May 28-31, 2002. Refereed and accepted by Publications of the Astronomical Society of Australia. 4 pages. Final version copyedited by PASA Editor