The Chemical Composition of Carbon C(N) stars

Details The Chemical Composition of Carbon C(N) stars The Chemical Composition of Carbon C(N) stars

2003-02-14

arxiv.org/abs/astro-ph/0302278v1

Astronomy and Astrophysics

Astrophysics

Oral talk presented in "CNO in the Universe". Eds. C. Charbonnel, D. Schaerer, & G. Maynet. ASI Conference Series, in press

Scientific paper

A chemical study of normal Galactic C(N) carbon stars is presented. Abundances of Li, CNO isotopes and s-elements are derived. The derived abundances of s-elements nicely agree with theoretical s-process nucleosynthesis predictions during the AGB phase. However, the figures obtained for Li and the 12C/13C ratios might imply the existence of a non-standard mixing process during the AGB phase operating preferentially in low mass stars. The intrinsic or extrinsic nature of C(N) stars is also discussed.

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