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Evidence of a SiO collimated outflow from a massive YSO in IRAS 17233–3606.
- Source :
-
Astronomy & Astrophysics / Astronomie et Astrophysique . Jun2013, Vol. 554 Issue 4, p1-11. 11p. - Publication Year :
- 2013
-
Abstract
- 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 IRAS 17233-3606 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. [ABSTRACT FROM AUTHOR]
- Subjects :
- *STAR formation
*SUPERGIANT stars
*PROTOSTARS
*SILICON oxide
*STELLAR mass
Subjects
Details
- Language :
- English
- ISSN :
- 00046361
- Volume :
- 554
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Astronomy & Astrophysics / Astronomie et Astrophysique
- Publication Type :
- Academic Journal
- Accession number :
- 88031722
- Full Text :
- https://doi.org/10.1051/0004-6361/201118154