The Possibly Remnant Massive Outflow in G5.89-0.39 : I - Observations and Initial MHD Simulations

We have obtained maps of the large scale outflow associated with the UCHII region G5.89-0.39 in CO and CO (J=3-2), SiO (J=8-7,J=5-4), SO2 (J=132,12131,13) and H CO(J=4-3). From these maps we have been able to determine the mass (3.3 M⊙), momentum (96 M⊙ km s ), energy (3.5× 10 erg), mechanical luminosity (141 L⊙), and mass loss rate (∼ 1× 10 −3 M⊙ yr ) in the large scale outflow. The observationally derived parameters were used to guide 3D magnetohydrodynamic models of the jet entrained outflow. Through the combination of observations and simulations, we suggest that the large scale outflow may be inclined by approximately 45 to the line of sight, and that the jet entraining the observed molecular outflow may have been active for as little as 1000 years, half the kinematic age of the outflow. Subject headings: Stars: Formation – ISM: Jets and Outflows – Hydrodynamics Currently at McMaster University, Hamilton, ON, Canada Currently at Astrophysical Institute Potsdam, Potsdam, Germany Also at University of Calgary