The significance of tidal interactions in the evolution of the faint radio population (sub-mJy) is studied using a deep and homogeneous radio survey (1.4GHz), covering an area of 3.14deg2 and complete to a flux density of 0.4 mJy. Optical photometric and spectroscopic data are also available for this sample. A statistical approach is employed to identify candidate physical associations between radio sources and optically selected 'field' galaxies. We find an excess of close pairs around optically identified faint radio sources, albeit at a low significance level, implying that the pairing fraction of the sub-mJy radio sources is similar to that of 'field' galaxies (at the same magnitude limit) but higher than that of local galaxies.
|Number of pages||5|
|Journal||Monthly Notices of the Royal Astronomical Society|
|Publication status||Published - 21 Nov 1999|
- Galaxies: active
- Galaxies: starburst - Cosmology: observations
- Radio continuum: galaxies