Jones, Thomas 96-16964 Dr. Jones will study the synchrotron radiation which results from the relativistic plasmas ejected from the nuclei of active galaxies and in the presence of a magnetic field. The research is a combined program using numerical simulations as well as radio observations using interferometer and single-dish mapping. The simulations will include the injection and transport of relativistic electrons and will show the predicted signatures of radio and x-ray emissions. Then very large radio galaxies will be observed with multiple frequencies, producing the spectral shapes for comparison with theory. Combining the theoretical and observational results should provide a check on the current assumptions about synchrotron sources.