We present observations of two radio galaxies, J1835+620 and 3C338, both with signs of having passed through different stages of core activity. The former presents two symmetric and bright components within a typical FR II structure, possibly resulting from two distinct phases of activity; the latter is a FR I radio galaxy with two separated regions with different age properties, possibly due to a switch-off and -on cycle in its core. In both sources, the optical counterpart lies in a group of galaxies with indications of mutual interaction, a scenario often invoked to explain triggering of core activity.
Cite
@article{arxiv.astro-ph/9909201,
title = {Restarting activity in radio galaxies},
author = {L. Lara and G. Giovannini and W. D. Cotton and L. Feretti and J. M. Marcaide and I. Marquez and G. B. Taylor and T. Venturi},
journal= {arXiv preprint arXiv:astro-ph/9909201},
year = {2009}
}
Comments
5 pages, 4 figures. To appear in "Life Cycles of Radio Galaxies", ed. J. Biretta et al., New Astronomy Reviews