COLLISIONS OF SHOCK-WAVES AND SUPERSONIC PHENOMENA IN THE COSMIC MEDIUM

Results of numerical simulations of the interaction between spherical shock waves are reported with special emphasis on the Courant-Friedric hs configuration. The evolution of this configuration is studied, in t he course of which two oppositely-directed gas flows moving away from the interaction zone of the primary fronts are formed behind the refle cted shocks. The possibility of explaining a number of supersonic phen omena in the interstellar and intergalactic media, such as ''molecular bullets'', bipolar outflows, etc., in terms of this process is explor ed. The problem of observational searches for Courant-Friedrichs-type configurations and dynamical structures that could develop during the evolution of such configurations is discussed.