Two-component jet simulations: II. Combining analytical disk and stellar MHD outflow solutions

Matsakos, T.
Massaglia, S.
Trussoni, E.
Tsinganos, K.
Vlahakis, N.
Sauty, C.
Mignone, A.
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Theoretical arguments along with observational data of YSO jets suggest the presence of two steady components: a disk wind type outflow needed to explain the observed high mass loss rates and a stellar wind type outflow probably accounting for the observed stellar spin down. Each component's contribution depends on the intrinsic physical properties of the YSO-disk system and its evolutionary stage. The main goal of this paper is to understand some of the basic features of the evolution, interaction and co-existence of the two jet components over a parameter space and when time variability is enforced. Having studied separately the numerical evolution of each type of the complementary disk and stellar analytical wind solutions in Paper I of this series, we proceed here to mix together the two models inside the computational box. The evolution in time is performed with the PLUTO code, investigating the dynamics of the two-component jets, the modifications each solution undergoes and the potential steady state reached.
Comment: accepted for publication in A&A
Astrophysics - Astrophysics of Galaxies