Possible Relic Lobes in Giant Radio Sources
Abstract
We present low-frequency observations with the GMRT of three giant radio sources (J0139+3957, J0200+4049 and J0807+7400) with relaxed diffuse lobes which show no hotspots and no evidence of jets. The largest of these three, J0200+4049, exhibits a depression in the centre of the western lobe, while J0139+3957 and J0807+7400 have been suggested earlier by Klein et al. and Lara et al. respectively to be relic radio sources. We estimate the spectral ages of the lobes. All three sources have compact radio cores. Although the radio cores suggest that the sources are currently active, we suggest that the lobes in these sources could be due to an earlier cycle of activity.
Keywords
Cite
@article{arxiv.0905.0442,
title = {Possible Relic Lobes in Giant Radio Sources},
author = {S. Godambe and C. Konar and D. J. Saikia and P. J. Wiita},
journal= {arXiv preprint arXiv:0905.0442},
year = {2009}
}
Comments
To appear in ASP Conference Series, Vol. 407, The Low-Frequency Radio Universe, eds D. J. Saikia, D. A. Green, Y. Gupta and T. Venturi (Conference held at NCRA, Pune, India from 8th to 12th December 2008)