Bispectrum speckle interferometry of the massive protostellar object S140 IRS 1: Evidence for multiple outflows

Weigelt, G. and Balega, Y.Y. and Preibisch, T. and Schertl, D. and Smith, M.D. (2002) Bispectrum speckle interferometry of the massive protostellar object S140 IRS 1: Evidence for multiple outflows. Astronomy and Astrophysics, 381 (3). pp. 905-913. ISSN 0004-6361. (doi:https://doi.org/10.1051/0004-6361:20011562) (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)

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Official URL
http://dx.doi.org/10.1051/0004-6361:20011562

Abstract

Bispectrum speckle interferometry is employed to explore the immediate environment of the deeply embedded young stellar object S140 IRS 1. A K′-band (2.0-2.3 μm) diffraction-limited resolution of 76 mas (∼70 AU) is achieved with the SAO 6 m telescope, as well as a dynamical range of more than 8 mag and a field of view of 13″ × 21″. Our image exhibits many previously unseen complex structures. In addition to the bright, elongated, and very clumpy feature pointing from the central source to the south-east, which was already discussed in a previous paper (Schertl et al. 2000), we find several arc-like structures north-east of IRS 1, extended diffuse emission south of IRS 1, and four new point sources. The diffuse and fragmentary structures close to IRS 1 appear to trace circumstellar material swept up by energetic outflows. In combination with molecular line emission maps from the literature, our image provides direct confirmation that two distinct bipolar outflow systems continue to be driven from IRS 1 on scales between 3″ and 100″. A system of three arc-like structures to the north-east is consistent with cavities excavated by a precessing jet or wind-driven outflow. We discuss the implications for the nature of the central source.

Item Type: Article
Uncontrolled keywords: Stars: formation, Stars: individual: S140 IRS1, 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 10:04 UTC
Last Modified: 12 Aug 2015 14:28 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/50132 (The current URI for this page, for reference purposes)
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