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Chemical models of AGB winds

Published online by Cambridge University Press:  25 May 2016

I. Cherchneff
I. Cherchneff*
Affiliation:
Physics Department, UMIST, P.O. Box 88, Manchester W601QD, United Kingdom

Abstract

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We present chemical models of the inner circumstellar envelope of a typical carbon-rich AGB star. The effect of pulsation-driven shocks on the gas close to the stellar photosphere is considered. The chemistry of dust condensation nuclei formation is described and applied to the gas layers close to the star. We derive formation yields for polycyclic aromatic hydrocarbon (PAH) species and their dimers and discuss their role in the condensation of dust. Models of the chemistry of silicon- and sulfur-bearing molecules in the inner envelope are also presented.

Type
Stars and Circumstellar Envelopes
Information
Symposium - International Astronomical Union , Volume 178: Molecules in Astrophysics: Probes and Processes , 1997 , pp. 469 - 476
Copyright
Copyright © Kluwer 1997 

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