2002/09/30 by Andrzej Marecki, A. Marecki, Peter D. Barthel +4 · 2 citations
Physics and Astronomy · #Astronomy #Astrophysics #Classical mechanics #Computer science #Core (optical fiber) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Gamma-ray bursts and supernovae #Geodesy #Geology #Global Positioning System #Kinematics #Optics #Physics #Radio Astronomy Observations and Technology #Telecommunications #Very-long-baseline interferometry #astro-ph
paper · pdf · doi:10.1071/as02032
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
arxiv created 2002/10/14 · openalex publication_date 2003/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.