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Evidence of a SiO collimated outflow from a massive YSO in IRAS 17233-3606

Leurini, S. and Codella, C. and Gusdorf, A. and Zapata, L. and Gómez-Ruiz, A. and Testi, L. and Pillai, T. (2013) Evidence of a SiO collimated outflow from a massive YSO in IRAS 17233-3606. Astronomy and Astrophysics, 554 . Art. No. A35. ISSN 0004-6361. doi:10.1051/0004-6361/201118154.

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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.

Item Type:Article
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URLURL TypeDescription DOIArticle Paper
Codella, C.0000-0003-1514-3074
Testi, L.0000-0003-1859-3070
Additional Information:© 2013 ESO. Article published by EDP Sciences. Received 26 September 2011; Accepted 3 April 2013. Published online 31 May 2013. The authors would like to thank the anonymous referee who helped to clarify the results and improve the discussion. A. Gusdorf acknowledges support by the grant ANR-09-BLAN-0231-01 from the French Agence Nationale de la Recherche as part of the SCHISM project.
Funding AgencyGrant Number
Agence Nationale pour la Recherche (ANR)ANR-09-BLAN-0231-01
Subject Keywords:stars: protostars – stars: formation – ISM: jets and outflows – ISM: individual objects: IRAS 17233-3606
Record Number:CaltechAUTHORS:20130813-090635800
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:39884
Deposited By: Tony Diaz
Deposited On:19 Aug 2013 18:27
Last Modified:09 Nov 2021 23:47

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