Silicon and sulphur chemistry in the inner wind of IRC+10216

Details Silicon and sulphur chemistry in the inner wind of IRC+10216 Silicon and sulphur chemistry in the inner wind of IRC+10216

Feb 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...330..676w&link_type=abstract

Astronomy and Astrophysics, v.330, p.676-684 (1998)

Astronomy and Astrophysics

Astrophysics

66

Molecular Processes, Stars: Agb, Stars: Individual: Irc+10216

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. Table 5 is only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/Abstract.html

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