Title: Detection of "parent" molecules from the inner wind of AGB stars as tracers of non-equilibrium chemistry
Authors: Decin, Leen ×
Cherchneff, I
Hony, S
Dehaes, Sofie
De Breuck, C
Menten, K. M #
Issue Date: Mar-2008
Publisher: Edp sciences s a
Series Title: Astronomy & astrophysics vol:480 issue:2 pages:431-438
Abstract: Context. Asymptotic Giant Branch (AGB) stars are typified by strong dust-driven, molecular outflows. For long, it was believed that the molecular content of the circumstellar envelope of AGB stars is primarily determined by the atmospheric C/O ratio. However, recent observations of molecules such as HCN, SiO, and SO reveal gas-phase abundances higher than predicted by thermodynamic equilibrium (TE) models. UV-photon initiated dissociation in the outer envelope or non-equilibrium formation by the effect of shocks in the inner envelope may be the origin of the anomolous abundances.
ISSN: 0004-6361
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Institute of Astronomy
Mathematics - miscellaneous
× corresponding author
# (joint) last author

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