Protostellar Jets and Turbulence in Molecular Clouds: The Role of Interactions

Abstract

We present a series of numerical studies of the interaction of colliding radiative, hydrodynamic young stellar outflows. We study the effect of the collision impact parameter on the acceleration of ambient material and the degree to which the flow is isotropized by the collision as a mechanism for driving turbulence in the parent molecular cloud. Our results indicate that the high degrees of compression of outflow material, achieved through radiative shocks near the vertex of the interaction, prevents the redirected outflow from spraying over a large spatial region. Furthermore, the collision reduces the redirected outflow's ability to entrain and impart momentum into the ambient cloud. Consideration of the probabilities of outflow collisions leads us to conclude that individual low velocity fossil outflows are the principle coupling between outflows and the cloud.

arXiv comment21 pages, 10 figures, submitted to ApJ

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• Simulating Magnetohydrodynamical Flow with Constrained Transport and Adaptive Mesh Refinement; Algorithms & Tests of the AstroBEAR Code
• Protostellar outflow-driven turbulence
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• A Pulsed, Precessing Jet in Cepheus A
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• Isotropically Driven versus Outflow Driven Turbulence: Observational Consequences for Molecular Clouds
• Protostellar Outflow Evolution in Turbulent Environments
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• Molecular CO outflows in the L1641-N cluster: kneading a cloud core
• ALMA Reveals A Collision Between Protostellar Outflows in BHR71
• X-ray embedded stars as driving sources of outflow-driven turbulence in OMC1-S
• Hypersonic Buckshot: Astrophysical Jets as Heterogeneous Collimated Plasmoids
• Curved jet motion. I. Orbiting and precessing jets
• The Interaction Between a Pulsed Astrophysical Jet and Small-Scale Heterogeneous Media
• Supersonic turbulence in 3D isothermal flow collision
• Non-LTE radiation hydrodynamics in PLUTO
• Studying Interstellar Turbulence Driving Scales using the Bispectrum
• Theory of Feedback in Clusters and Molecular Cloud Turbulence
• Unveiling the collision between molecular outflows: observational evidence and hydrodynamic simulations