IRC+10216 Silicon and sulfur chemistry (Willacy+ 1998)

Details IRC+10216 Silicon and sulfur chemistry (Willacy+ 1998) IRC+10216 Silicon and sulfur chemistry (Willacy+ 1998)

Sep 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997ycat..33300676w&link_type=abstract

VizieR On-line Data Catalog: J/A+A/330/676. Originally published in: 1998A&A...330..676W

Physics

Atomic Physics

Atomic Physics, Stars: Giant

Scientific paper

We present a dynamical and chemical model of the inner wind of the carbon-rich, AGB star IRC+10216. We include the effect of pulsation-driven shocks on the gas envelope close to the stellar photosphere and construct an extended chemical model that includes in particular the chemistry of hydrocarbon species and silicon and sulphur-bearing molecules. The derived theoretical abundances for many molecules are in excellent agreement with values obtained from observations of infrared ro-vibrational molecular lines. We confirm the ``parent'' character of certain chemical species and show that the inner wind of IRC+10216, and more generally of evolved AGB stars, is an active dynamical and chemical region where molecules are formed and processed. (1 data file).

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