The Dynamics of Stellar Jets

This paper discusses the formation of two-shock working surfaces in Herbig-Haro (HH) jets. These working surfaces can be formed either at the leading edge of the jet flow, or inside the body of the jet beam (as a result of variabilities in the jet flow velocity), and depending on the parameters of the flow can be either massless or mass conserving. It is shown that observations might indicate that these two regimes actually occur in some HH jets. This revised version was published online in July 2006 with corrections to the Cover Date.