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Title:
The disappearance of the 1667-MHz OH maser in IRAS 17436+5003 (HD 161796)
Authors:
Bains, I.; Yates, J. A.; Gledhill, T. M.; Richards, A. M. S.
Affiliation:
AA(Astronomy Group, Department of Physical Sciences, University of Hertfordshire, College Lane, Hatfield, Hertfordshire AL10 9AB), AB(Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT), AC(Astronomy Group, Department of Physical Sciences, University of Hertfordshire, College Lane, Hatfield, Hertfordshire AL10 9AB), AD(Jodrell Bank Observatory, Department of Physics & Astronomy, University of Manchester, Macclesfield, Cheshire SK11 9DL)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 346, Issue 3, pp. L46-L50. (MNRAS Homepage)
Publication Date:
12/2003
Origin:
MNRAS
MNRAS Keywords:
masers, stars: AGB and post-AGB, circumstellar matter, stars: individual: IRAS 17436+5003, radio lines: stars
DOI:
10.1111/j.1365-2966.2003.07334.x
Bibliographic Code:
2003MNRAS.346L..46B

Abstract

We report the diminution of the 1667-MHz OH maser in the post-asymptotic giant branch star IRAS 17436+5003, by a factor of >~17 over a period of <~12 yr, from observations with MERLIN. This circumstellar maser was detected by Likkel in 1987, at the 13σ level of her observations with the Green Bank Telescope. We discuss a number of possible reasons for this phenomenon and conclude that it is most likely due to turbulence arising from interacting stellar winds.

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