volume 13, issue S332, P43-46 2017
DOI: 10.1017/s1743921317007724
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M. Van de Sande, J. O. Sundqvist, T. J. Millar, L. Decin

Abstract: AbstractThe molecular composition of the stellar outflows of AGB stars is determined by the stellar elemental carbon-to-oxygen abundance ratio, together with the physical circumstances in the innermost region of the outflow. Near the stellar surface, thermal equilibrium (TE) can be assumed. This leads to a certain molecular composition with a O- or C-rich signature. However, several molecular species have been detected that are not expected to be present in the inner region under the assumption of TE chemistry…

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