Radiation pattern of radio and optical components of extended radio sources

Abstract

The relation between the \(D/\sqrt I \) and I_C/I_SUM parameters and radiation patterns of the optical and radio components of an extended radio source is analyzed, where D and I are the apparent size and observed radiation intensity, respectively, of the source or its components. The parameters of the pattern in the optical and radio (1.4 GHz) ranges are estimated. The radiation pattern of extended radio-emitting regions is close to spherical and the radiation of the central component is concentrated in a 24◦ wide beam. Its luminosity is a factor of 4.58 higher than that of the extended component of the radio source. The radiation pattern of the optical component of the radio source turned out to be unexpectedly non-spherical: the main lobe of the pattern is about 26◦ wide. The g-band luminosity is 6.4–12.3 times higher than the luminosity of the spherical fraction of the “optical” radiation pattern. A list of 116 new giant radio sources is presented.