Adiabatic shocks are more efficient at particle acceleration while radiative shocks strongly compress the gas.

A case of interest is when the two types of shocks occur simultaneously. However, in the presence of high velocities, the formation of adiabatic shocks is also possible. Radiative shocks are expected to form in these systems given their high densities. A two-shock system is expected to be formed in the termination region where the jet, or the outflow material, and the ambient medium impact. This has been confirmed by radio and gamma-ray detection, respectively. Universidade de São Paulo, Instituto de Astronomia, Geofísica e Ciências Atmosféricas, BrazilĮ-mail: Univers et Particules de Montpellier (LUPM) Université Montpellier, CNRS, FranceĮLI Beamlines, Institute of Physics, Czech Academy of Sciences, 25241 Dolní Břežany, Czech RepublicĪstronomical Institute, Czech Academy of Sciences, Boční II 1401, 141 00 Prague, Czech RepublicĮ-mail: Laboratory, Imperial College London, London SW7 2BW, UKĮ-mail: The termination regions of non-relativistic jets in protostars and supersonic outflows in classical novae are non-thermal emitters.

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Shock the system