It is shown that inelastic proton collisions in extragalactic radio sources can account for their radio and -ray emissions. The proton Lorentz-factor p responsible for -ray emission is estimated to lie between 1.4 and 86. But for the radio emission (with e ~ 103-104) the estimated p values lie between 7 to 300. The estimates of total particle and magnetic energy for a typical radio source is in agreement with equipartition theory.
Astrophysics and Space Science 03/1987; 132(1):65-72. DOI:10.1007/BF00637782