Making Fanaroff-Riley I radio sources

Extragalactic radio sources appear under different morphologies, the most frequent ones are classified as Fanaroff-Riley type I (FR I), typically with lower luminosities, and II, II), more luminous. This simple classification, however, has many exceptions that we intend to investigate. Following previous analyses in three-dimensional Hydrodynamic Magneto-Hydrodynamic limits, extend numerical investigation Relativistic regime, include whose jet kinetic power sets range separates FR Is from IIs. We consider weakly mildly relativistic, underdense, supersonic jets propagate a stratified medium. In model, ambient temperature increases distance origin maintaining constant pressure. present three cases low, high intermediate luminosity evolve into morphologies. find resulting morphology can be highly time dependent that, apart power, jet-to-ambient density ratio magnetization parameter play crucial role evolution well.