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Abundances of C, N and O as probes of mixing in low-mass helium-core burning stars

Published online by Cambridge University Press:  01 August 2006

G. Tautvaišienė ,
B. Edvardsson ,
E. Puzeras  and
I. Ilyin
G. Tautvaišienė
Affiliation:
Institute of Theoretical Physics and Astronomy of Vilnius University, Gostauto 12, 01108 Vilnius, Lithuania email: taut@itpa.lt
B. Edvardsson
Affiliation:
Department of Astronomy and Space Physics, Uppsala Observatory, Box 515, 751 20 Uppsala, Sweden email: bengt.edvardsson@astro.uu.se
E. Puzeras
Affiliation:
Institute of Theoretical Physics and Astronomy of Vilnius University, Gostauto 12, 01108 Vilnius, Lithuania email: taut@itpa.lt
I. Ilyin
Affiliation:
Astrophysical Institute Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany email: ilyin@aip.de
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Abstract

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A large population of helium-core-burning clump stars of the Galactic field, revealed by the Hipparcos orbiting observatory, is an excellent target for the analysis of mixing processes in evolved low-mass metal-abundant stars. In this contribution we overview first result of 12C, 13C, N and O abundance determinations in our extensive project which we started with the aim at deriving the fundamental parameters and abundances of more than 20 chemical elements in a large sample of Galactic clump stars.

Keywords

Stars: abundancesstars: horizontal-branch
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S239: Convection in Astrophysics , August 2006 , pp. 301 - 303
Copyright
Copyright © International Astronomical Union 2007

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