Evidence for variable outflows in the young stellar object V645 Cygni

Clarke, A.J. and Lumsden, Stuart L. and Oudmaijer, Rene D. and Busfield, A.L. and Hoare, Melvin G. and Moore, Toby J.T. and Sheret, T.L. and Urquhart, J.S. (2006) Evidence for variable outflows in the young stellar object V645 Cygni. Astronomy and Astrophysics, 457 (1). pp. 183-188. ISSN 0004-6361. (doi:https://doi.org/10.1051/0004-6361:20064839) (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://www.dx.doi.org/10.1051/0004-6361:20064839

Abstract

Aims. As part of the Red MSX Source Survey of Massive Young Stellar Objects (MYSOs) we have conducted multi-wavelength follow up observations of the well-known object V645 Cygni. We present our data on this object, whose near-infrared spectrum is exceptional and place these in context with previous observations Methods. Our observations of V645 Cyg included near/mid infrared imaging observations, 13CO 2-1 line observations and high signal-to-noise velocity resolved near-infrared spectroscopy. Results. The spectrum shows P-Cygni hydrogen Brackett emission, consistent with a high velocity stellar wind. A red-shifted emission component to a number of near-IR emission lines was also uncovered. This is associated with a similar component in the Hα- line. V645 Cyg is also found to have variable CO first overtone bandhead emission. Conclusions. The data clearly indicate that the outflow of V645 Cyg is variable. The unidentified feature in a previously published optical spectrum is identified with a receding outflow at 2000 kms-1. The nature of this feature, which is found in hydrogen and helium atomic lines and CO molecular lines remains a puzzle. © ESO 2006.

Item Type: Article
Uncontrolled keywords: Circumstellar matter, Stars: early-type, Stars: winds, outflows, Techniques: spectroscopic, Astronomy, Hydrogen, Infrared spectroscopy, Spectroscopic analysis, Wind effects, Circumstellar matters, Optical spectrum, Outflows, Space research
Subjects: Q Science > QB Astronomy > QB460 Astrophysics
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: James Urquhart
Date Deposited: 30 Nov 2015 16:46 UTC
Last Modified: 31 May 2018 11:29 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/52246 (The current URI for this page, for reference purposes)
Urquhart, J.S.: https://orcid.org/0000-0002-1605-8050
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