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Issue A&A
Volume 415, Number 1, February III 2004
Page(s) 217 - 230
Section Interstellar and circumstellar matter
DOI http://dx.doi.org/10.1051/0004-6361:20034355



A&A 415, 217-230 (2004)
DOI: 10.1051/0004-6361:20034355

The Cygnus X region

XXII. A probable HAeBe star with a giant bipolar outflow in DR 16
O. P. Behre1, H. J. Wendker1, L. A. Higgs2 and T. L. Landecker2

1  Hamburger Sternwarte, Gojenbergsweg 112, 21029 Hamburg, Germany
2  National Research Council, Herzberg Institute of Astrophysics, Dominion Radio Astrophysical Observatory, Box 248, Penticton, BC V2A 6J9, Canada

( Received 19 September 2003 / Accepted 3 November 2003 )

Abstract
From medium-resolution radio images, DR 16 was suspected to be a large cometary nebula. To test this suggestion we obtained a higher resolution (15´´) VLA continuum map. We also analyzed data from the Canadian Galactic Plane Survey in continuum, $\ion{H}{i}$ line, and IR. These data were supplemented by published near-infrared ( J, H, K) stellar photometric results and MSX 8.28  $\mu $m data. We suggest that DR 16 is the diffuse $\ion{H}{ii}$ region of an ongoing star formation site at a distance of about 3 kpc. The complicated radio picture arises from the superposition of diffuse $\ion{H}{ii}$ with the remains of a giant bipolar outflow. The outflow was generated by a probable Herbig AeBe star, and the lobes are the remnants of its working surfaces. Additional ring-like features are discussed. DR 16 is part of a larger volume of space in the local spiral arm where star formation is an ongoing process.


Key words: stars: winds, outflows -- stars: population II -- ISM: general -- ISM: $\ion{H}{ii}$ regions -- ISM: individual objects: DR 16 -- radio continuum: ISM

Offprint request: H. J. Wendker, hjwendker@hs.uni-hamburg.de

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© ESO 2004


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