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Is extra mixing really needed in asymptotic giant branch stars?

Karakas, Amanda; Campbell, Simon; Stancliffe, Richard J


We demonstrate that the amount of extra mixing required to fit the observed low C/N and12C/13C ratios in first giant branch (FGB) stars is also sufficient to explain the carbon and nitrogen abundances of Galactic asymptotic/second giant branch (AGB) stars. We simulate the effect of extra mixing on the FGB by setting the composition of the envelope to that observed in low-mass (M ≤ 2 M) FGB stars, and then evolve the models to the tip of the AGB. The inclusion of FGB extra mixing compositional...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/713/1/374


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