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C-enhanced metal poor stars and AGB nucleosynthesis at low Z

Published online by Cambridge University Press:  23 December 2005

Sara Lucatello ,
Raffaele Gratton ,
Eugenio Carretta  and
Timothy Beers
Sara Lucatello
Affiliation:
INAF-OAPD, vicolo dell'Osservatorio 5, 35122, Padova, Italy email: lucatello@pd.astro.it
Raffaele Gratton
Affiliation:
INAF-OAPD, vicolo dell'Osservatorio 5, 35122, Padova, Italy email: lucatello@pd.astro.it
Eugenio Carretta
Affiliation:
INAF-OABO, via Ranzani 1, 40127, Bologna, Italy
Timothy Beers
Affiliation:
Michigan State University, East Lansing MI 48824, USA
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Abstract

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The study of C-enhanced metal poor stars with s-process elements overabundances offers a chance of testing the AGB models at low metallicity and constrain the nucleosynthesis codes. We analyzed a total of 13 C-enhanced metal poor stars, of which 12 turned out to be s-process enriched. The combination of our results with the analyses already published in the literature allows to highlight the discrepancies present between the current state of the art AGB low metallicity models, suggesting that they are still lacking some ingredient.

Keywords

Stars: AGB and post-AGBstars: chemically peculiarbinaries: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Symposium S228: From Lithium to Uranium: Elemental Tracers of Early Cosmic Evolution , May 2005 , pp. 473 - 477
Copyright
© 2005 International Astronomical Union