OBSERVATIONS OF THE RADIO GALAXY 3C-31 AT 102-MHZ

Observations of the radio galaxy 3C 31 at 102 MHz frequency were carri ed out by the method of interplanetary scintillations. The upper limit of the flux density of the compact radio source in the 3C 31 nucleus was estimated (S(nucl) < 0.05 Jy). Magnetic field strength (H less-tha n-or-similar-to 10(-1) gauss), magnetic field energy (E(H) approximate ly 10(51) erg), and the energy of relativistic electrons (E(e) approxi mately 10(50) erg) at scale approximately 1 pc were estimated, with th e assumption that the low-frequency cutoff of the compact (theta = 0.0 02'') radio source in the 3C 31 is due to synchrotron self-absorption. The obtained isophotes show that radio source 3C 31 has a length of r adio jets 1.5 - 2 times larger in the meter wave band than was earlier believed. The integral flux density of S(I) = 72 +/- 15 Jy was estima ted. This work confirms a previously noticed correlation between the m orphological type of radio galaxies and physical conditions in the nuc lei of their host galaxies. The energy of the magnetic field is higher than the energy of relativistic electrons in the nuclei of radio gala xies of classical morphology, in which giant radio lobes are connected by jets to the nuclei of their host galaxy. The reverse relationship between the energy of the magnetic field and relativistic plasma exist s in the nuclei of the radio galaxies without jets. Whereas in the nuc lei of the tail galaxies, approximate equilibrium distribution of ener gy is observed.