Non-thermal emission from massive protostellar jets

Stars are born deeply ensconced in dense clouds of interstellar medium. Protostellar jets launched in the early evolutionary phase of these young stellar objects are targets of intense scrutiny, to understand the properties of the protostellar systems. We have investigated a few jets from massive embedded protostars through their interaction with the ambient medium, in radio and infrared wavebands and we trace emission from shocked regions where the jet impacts the medium. Our results from GMRT, India, at low radio frequencies have confirmed the presence of non-thermal synchrotron emission from these jets, unlike measurements at higher radio frequencies that usually trace thermal free-free emission. We assimilate the observed emission measurements within a numerical model that we have developed, which incorporate the effects of both thermal and non-thermal emission, to understand the properties of the jets and ambient medium in the vicinity.