1245+676 — A CSO/GPS Source being an Extreme Case of a Double-Double Structure
- 1 January 2003
- journal article
- Published by Cambridge University Press (CUP) in Publications of the Astronomical Society of Australia
- Vol. 20 (1) , 16-18
- https://doi.org/10.1071/as02032
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 CSOs lobes, measured its velocity, and inferred the kinematic age of that structure.Keywords
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