Title: On the physical structure of IRC+10216 Ground-based and Herschel observations of CO and C2H
Authors: De Beck, Elvire ×
Lombaert, Robin
Agundez, M
Daniel, F
Decin, Leen
Cernicharo, J
Mueller, H. S. P
Min, M
Royer, Pierre
Vandenbussche, Bart
de Koter, Alex
Waters, L. B. F. M
Groenewegen, M. A. T
Barlow, M. J
Guelin, M
Kahane, C
Pearson, J. C
Encrenaz, P
Szczerba, R
Schmidt, M. R #
Issue Date: Mar-2012
Publisher: EDP Sciences
Series Title: Astronomy & Astrophysics vol:539 pages:-
Article number: A108
Abstract: Context. The carbon-rich asymptotic giant branch star IRC+10 216 undergoes strong mass loss, and quasi-periodic enhancements of the density of the circumstellar matter have previously been reported. The star's circumstellar environment is a well-studied and complex astrochemical laboratory, in which many molecular species have been proved to be present. CO is ubiquitous in the circumstellar envelope, while emission from the ethynyl (C2H) radical is detected in a spatially confined shell around IRC+10 216. We recently detected unexpectedly strong emission from the N = 4-3, 6-5, 7-6, 8-7, and 9-8 transitions of C2H with the IRAM 30m telescope and with Herschel/HIFI, which challenges the available chemical and physical models.
ISSN: 0004-6361
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Institute of Astronomy
× corresponding author
# (joint) last author

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