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Issue A&A
Volume 448, Number 3, March IV 2006
Page(s) 1037 - 1042
Section Interstellar and circumstellar matter
DOI http://dx.doi.org/10.1051/0004-6361:20041852

A&A 448, 1037-1042 (2006)
DOI: 10.1051/0004-6361:20041852

The extremely high-velocity molecular outflow in IRAS 20126 $\mathsf{+}$4104

M. Lebrón1, H. Beuther2, 3, P. Schilke4 and Th. Stanke4, 5

1  Arecibo Observatory, HC 03 Box 53995, Arecibo 00612, Puerto Rico
    e-mail: mlebron@naic.edu
2  Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS 78 Cambridge, MA 02138, USA
3  Max-Planck-Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany
4  Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
5  University of Hawaii, Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, Hawaii 96822-1897, USA

(Received 17 August 2004 / Accepted 7 October 2005 )

Abstract
New sensitive CO(2-1) observations of the massive star-forming region IRAS 20126+4104 reveal a high-velocity gas component that has not been observed before. Comparing the morphologies of the high-velocity CO and the molecular jet traced by H2 and SiO, we found various orientations projected on the plane of the sky that could be interpreted in terms of jet precession. The outflow shows a steepening mass spectrum with increasing flow velocities. The high-velocity gas in IRAS 20126+4104 contributes significantly to the energy and momentum of the flow.


Key words: stars: formation -- ISM: jets and outflows -- ISM: individual objects: IRAS 20126+4104

SIMBAD Objects




© ESO 2006


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