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WFCAM, Spitzer/IRAC and SCUBA observations of the massive star-forming region DR21/W75 - I. The collimated molecular jets

Davis, C.J., Kumar, M S N, Sandell, G., Froebrich, Dirk, Smith, Michael D., Currie, M.J. (2007) WFCAM, Spitzer/IRAC and SCUBA observations of the massive star-forming region DR21/W75 - I. The collimated molecular jets. Monthly Notices of the Royal Astronomical Society, 374 (1). pp. 29-53. ISSN 0035-8711. (doi:10.1111/j.1365-2966.2006.11163.x) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:2312)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided.
Official URL:
http://www.blackwell-synergy.com/doi/abs/10.1111/j...

Abstract

We present wide-field near-infrared (IR) images of the DR21/W75 high-mass star-forming region, obtained with the Wide Field Camera (WFCAM) on the United Kingdom Infrared Telescope. Broad-band JHK and narrow-band H-2 1-0S(1) images are compared to archival mid-IR images from the Spitzer Space Telescope, and 850-mu m dust-continuum maps obtained with the Submillimeter Common User Bolometer Array (SCUBA). Together these data give a complete picture of dynamic star formation across this extensive region, which includes at least four separate star-forming sites in various stages of evolution. The H-2 data reveal knots and bow shocks associated with more than 50 individual flows. Most are well collimated, and at least five qualify as parsec-scale flows. Most appear to be driven by embedded, low-mass protostars. The orientations of the outflows, particularly from the few higher mass sources in the region (DR21, DR21(OH), W75N and ERO 1), show some degree of order, being preferentially orientated roughly orthogonal to the chain of dusty cores that runs north-south through DR21. Clustering may inhibit disc accretion and therefore the production of outflows; we certainly do not see enhanced outflow activity from clusters of protostars. Finally, although the low-mass protostellar outflows are abundant and widely distributed, the current generation does not provide sufficient momentum and kinetic energy to account for the observed turbulent motions in the DR21/W75 giant molecular clouds. Rather, multiple epochs of outflow activity are required over the million-year time-scale for turbulent decay.

Item Type: Article
DOI/Identification number: 10.1111/j.1365-2966.2006.11163.x
Uncontrolled keywords: circumstellar matter; stars : formation; ISM : individual : DR21; ISM : individual : DR21(OH); ISM : individual : W75; ISM : jets and outflows; ISM : kinematics and dynamics; infrared : stars
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: Louise Dorman
Date Deposited: 19 Mar 2008 08:39 UTC
Last Modified: 05 Nov 2024 09:33 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/2312 (The current URI for this page, for reference purposes)

University of Kent Author Information

Froebrich, Dirk.

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CReDIT Contributor Roles:

Smith, Michael D..

Creator's ORCID: https://orcid.org/0000-0002-4289-5952
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