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CNO abundance pattern in the red clump stars of the Milky Way

Published online by Cambridge University Press:  13 April 2010

G. Tautvaišienė ,
E. Puzeras ,
Y. Chorniy ,
G. Barisevičius  and
I. Ilyin
G. Tautvaišienė
Affiliation:
Institute of Theoretical Physics and Astronomy of Vilnius University, Gostauto 12, LT-01108, Vilnius, Lithuania email: taut@itpa.lt, puzeras@itpa.lt, ychorniy@itpa.lt, gintarasb@itpa.lt
E. Puzeras
Affiliation:
Institute of Theoretical Physics and Astronomy of Vilnius University, Gostauto 12, LT-01108, Vilnius, Lithuania email: taut@itpa.lt, puzeras@itpa.lt, ychorniy@itpa.lt, gintarasb@itpa.lt
Y. Chorniy
Affiliation:
Institute of Theoretical Physics and Astronomy of Vilnius University, Gostauto 12, LT-01108, Vilnius, Lithuania email: taut@itpa.lt, puzeras@itpa.lt, ychorniy@itpa.lt, gintarasb@itpa.lt
G. Barisevičius
Affiliation:
Institute of Theoretical Physics and Astronomy of Vilnius University, Gostauto 12, LT-01108, Vilnius, Lithuania email: taut@itpa.lt, puzeras@itpa.lt, ychorniy@itpa.lt, gintarasb@itpa.lt
I. Ilyin
Affiliation:
Astrophysical Institute Potsdam, An der Sternwarte 16, DE-14482, Potsdam, Germany email: ilyin@aip.de
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Abstract

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Hipparcos orbiting observatory has revealed a large number of helium-core- burning “clump” stars of the Galactic field. These low-mass stars exhibit signatures of extra-mixing processes that require modeling beyond the standard stellar theory. In this contribution we overview available results of 12C, 13C, N and O abundances obtained by high-resolution spectra for clump stars and discuss them in the light of current predictions of stellar evolution models.

Keywords

Stars: abundancesstars: evolutionstars: horizontal-branch
Type
Poster Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S262: Stellar Populations – Planning for the Next Decade , August 2009 , pp. 434 - 435
Copyright
Copyright © International Astronomical Union 2010

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