Deflection of jets induced by jet-cloud and jet-galaxy interactions

The model first introduced by Raga & Canto in which astrophysical jets are deflected on passing through an isothermal high-density region is generaliz ed by taking into account gravitational effects on the motion of the jet as it crosses the high-density cloud. The problem is also generalized for rel ativistic jets in which gravitational effects induced by the cloud are negl ected. Two further cases, classical and relativistic, are discussed for the cases in which the jet is deflected on passing through the interstellar ga s of a galaxy in which a dark matter halo dominates the gravitational poten tial. The criteria for the stability of jets due to the formation of intern al shocks are also discussed.