Astronomy and Astrophysics, volume 554A, 35-35 (2013/6-1)
Evidence of a SiO collimated outflow from a massive YSO in IRAS 17233-3606.
LEURINI S., CODELLA C., GUSDORF A., ZAPATA L., GOMEZ-RUIZ A., TESTI L. and PILLAI T.
Abstract (from CDS):
Studies of molecular outflows in high-mass young stellar objects reveal important information about the formation process of massive stars. We therefore selected the close-by IRAS17233-3606 massive star-forming region to perform SiO observations with the SMA interferometer in the (5-4) line and with the APEX single-dish telescope in the (5-4) and (8-7) transitions. In this paper, we present a study of one of the outflows in the region, OF1, which shows several properties similar to jets driven by low-mass protostars, such as HH211 and HH212. It is compact and collimated, and associated with extremely high velocity CO emission, and SiO emission at high velocities. We used a state-of-the-art shock model to constrain the pre-shock density and shock velocity of OF1. The model also allowed us to self-consistently estimate the mass of the OF1 outflow. The shock parameters inferred by the SiO modelling are comparable with those found for low-mass protostars, only with higher pre-shock density values, yielding an outflow mass in agreement with those obtained for molecular outflows driven by early B-type young stellar objects. Our study shows that it is possible to model the SiO emission in high-mass star-forming regions in the same way as for shocks from low-mass young stellar objects.
stars: protostars - stars: formation - ISM: jets and outflows - ISM: individual objects: IRAS 17233-3606
Status at CDS:
Outflows OFN not in Simbad.
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