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12C/13C Ratios and Li Abundances in Low-Mass C Stars

Published online by Cambridge University Press:  25 May 2016

Carlos Abia
Affiliation:
Dpto. Física Teórica y del Cosmos Universidad de Granada, 18071 Granada, Spain
Jordi Isern
Affiliation:
Centre d'Estudis Avançats de Blanes (CSIC) 18032 Blanes, Spain

Abstract

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High-resolution and high signal-to-noise-ratio spectroscopy is used to derive 12C/13C ratios from the Red System of the CN molecule at 8000 Å in several galactic low-mass C stars previously analyzed for lithium. It is found that Li-rich C stars usually have low isotopic ratios (< 15). This suggests that the Li and 13C enrichments in C stars might be produced by a similar mechanism. However, due to the large uncertainties in the abundance derivations for both Li and carbon isotope ratios, this result must be confirmed with further studies.

Information

Type
Session II — Models and Abundance Determinations
Copyright
Copyright © Kluwer 2000 

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