High-resolution near-infrared study of the deeply embedded young stellar object S140 IRS 3

Preibisch, T. and Balega, Y.Y. and Schertl, D. and Smith, M.D. and Weigelt, G. (2001) High-resolution near-infrared study of the deeply embedded young stellar object S140 IRS 3. Astronomy and Astrophysics, 378 (2). pp. 539-545. ISSN 0004-6361. (doi:https://doi.org/10.1051/0004-6361:20010815) (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)

Abstract

We explore the structures immediately surrounding the high-mass young stellar object S140 IRS 3 within the L1204 molecular cloud. We have obtained a bispectrum speckle interferometric K-band image with a resolution of 150 mas and a seeing-limited molecular hydrogen line emission image of IRS 3. Our speckle image resolves IRS 3 into three point sources, a close binary with separation 0.63? and a third component 1.3? away. A rough assessment of the system stability suggests that the IRS 3 triple system is unstable. Our speckle image also reveals extended diffuse emission of very complex morphology around IRS 3. An extended diffuse feature north-east of IRS 3 displays a remarkable S-shaped structure. This feature is the innermost part of an at least 15? long extended structure, which is pointing towards a bow-shock like patch located 90? away from IRS 3. We find strong H 2 line emission associated with this feature, suggesting the presence of shocks, caused by the collision of outflowing material with the ambient medium. The S-shaped structure of this feature can be well reproduced by a model assuming a precessing outflow from IRS 3a. Furthermore, we find several elongated features pointing away from IRS 3 in a southern direction. Some of these features also exhibit strong H 2 line emission, demonstrating that IRS 3 drives outflows in several directions.

Item Type:	Article
Uncontrolled keywords:	Outflows, Stars: formation, Stars: individual: S140 IRS3, Stars: winds, Techniques: interferometric
Subjects:	Q Science > QB Astronomy > QB460 Astrophysics
Divisions:	Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User:	Giles Tarver
Date Deposited:	11 Aug 2015 10:14 UTC
Last Modified:	12 Aug 2015 14:32 UTC
Resource URI:	https://kar.kent.ac.uk/id/eprint/50133 (The current URI for this page, for reference purposes)