Properties of COMP2CAT sources

This is the fifth in a series of radio source catalogs recently created, namely: FRICAT, FRIICAT, FR0CAT, and WATCAT, each of which focuses on a different class of radio galaxies. The main aim of our analysis is to attain a better understanding of sources with intermediate morphologies between FR IIs and FR 0s.

COMP2CAT sources were selected from an existing catalog of radio sources based on NVSS, FIRST and SDSS observations because they have i) edge-brightened morphologies typical of FR IIs, ii) redshifts z<0.15, and iii) projected linear sizes smaller than 60kpc. With radio luminosities at 1.4GHz 10^38^<L_1.4_<10^41^erg/s, COMP2CAT sources appear as the low radio luminosity tail of FR IIs. However, their host galaxies are indistinguishable from those of large-scale radio sources: they are luminous (-21>M_r_>-24), red, early-type galaxies with black hole masses in the range 10^7.5^<M_BH_<10^9.5^M_{sun}_.