Universität zu Köln

Leurini, S., Gusdorf, A., Wyrowski, F., Codella, C., Csengeri, T., van der Tak, F., Beuther, H., Flower, D. R., Comito, C. and Schilke, P. (2014). Water emission from the high-mass star-forming region IRAS 17233-3606. Astron. Astrophys., 564. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 1432-0746

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Abstract

We investigate the physical and chemical processes at work during the formation of a massive protostar based on the observation of water in an outflow from a very young object previously detected in H2O and SiO in the IRAS 17233-3606 region. We estimated the abundance of water to understand its chemistry, and to constrain the mass of the emitting outflow. We present new observations of shocked water obtained with the HIFI receiver onboard Herschel. We detected water at high velocities in a range similar to SiO. We self-consistently fitted these observations along with previous SiO data through a state-of-the-art, one-dimensional, stationary C-shock model. We found that a single model can explain the SiO and H2O emission in the red and blue wings of the spectra. Remarkably, one common area, similar to that found for H2O emission, fits both the SiO and H2O emission regions. This shock model subsequently allowed us to assess the shocked water column density, N-H20 = 1.2 x 10(18) cm(-2), mass, M-H20 = 12.5 M-circle plus and its maximum fractional abundance with respect to the total density, x(H2O) = 1.4 x 10(-4). The corresponding water abundance in fractional column density units ranges between 2.5 x 10(-5) and 1.2 x 10(-5), in agreement with recent- results obtained in outflows from low- and high-mass young stellar objects.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Leurini, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gusdorf, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wyrowski, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Codella, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Csengeri, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED van der Tak, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Beuther, H. UNSPECIFIED UNSPECIFIED UNSPECIFIED Flower, D. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Comito, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schilke, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-441396
DOI:	10.1051/0004-6361/201323343
Journal or Publication Title:	Astron. Astrophys.
Volume:	564
Date:	2014
Publisher:	EDP SCIENCES S A
Place of Publication:	LES ULIS CEDEX A
ISSN:	1432-0746
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MAGNETOHYDRODYNAMIC SHOCK-WAVES; HERSCHEL-HIFI; OUTFLOWS; SUBMILLIMETER; EXCITATION; PROTOSTARS; SPECTRA; PROGRAM Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/44139