Observations of faint radio galaxies with the RATAN-600 radio telescope

The results of observations of 79 faint radio galaxies from the Bologna Survey with the RATAN-600 radio telescope at the frequency 3.95 GHz are presented. An analysis of dependences of spectral indices of radio emission on the ratio of radio and optical luminosities has been carried out. The dependence of linear sizes of radio galaxies on these ratios and on spectral indices was studied. The relationships of angular sizes and spectral indices with flux densities have been investigated. It is shown that median angular sizes and spectral indices are increasing with flux density. It is shown also that among radio galaxies with flat spectra the objects of small linear sizes (<10 kpc) occur much more frequently than among radio galaxies with steep spectra