Jets from accretion discs

Highly collimated jets are associated with young stellar objects of all masses. They are also prevalent in microquasars and a variety of active galactic nuclei. Common to all of these systems is the presence of accretion discs around central objects, be they young stars, compact objects, or black holes. Current observations of protostellar systems support a model that posits accretionpowered, centrifugally accelerated, hydromagnetic disc winds …