Observations of 3C 129, 3C 129.1 and 3C 83.1B at 2.7 and 5 GHz

• Published in: Monthly notices of the Royal Astronomical Society Vol. 161; no. 2; pp. 167 - 180
• Main Authors: Riley, J. M., Longair, M. S.
• Format: Journal Article
• Language: English
• Published: Oxford, UK Oxford University Press 01.02.1973
• ISSN: 0035-8711; 1365-2966
• DOI: 10.1093/mnras/161.2.167

The radio sources 3C 129 and 3C 83.1B, each of which consists of a long ‘tail’ extending away from the associated galaxy, have been mapped at 27 and 5 GHz with the Cambridge One-Mile telescope. In each case, the double structure previously observed near the galaxy at 1.4 GHz is found to be of considerable complexity. There is a marked increase in spectral index along the tail in 3C 129 but not in 3C 83.1B despite the apparent similarity of structure. Observations have also been made of 3C 129.1 and reveal four components, two on each side of the associated galaxy. Tables are given summarizing the characteristics of 3C 129, 3C 83.1B, IC 310 and 5C4.81, and of the compact radio galaxies with which they may be physically associated.