Is extra mixing really needed in asymptotic giant branch stars?

Amanda Irene Karakas, Simon Wattana Campbell, Richard James Stancliffe

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Abstract

We demonstrate that the amount of extra mixing required to fit the observed low C/N and 12C/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 a?? 2 M ) FGB stars, and then evolve the models to the tip of the AGB
Original languageEnglish
Pages (from-to)374 - 382
Number of pages9
JournalThe Astrophysical Journal
Volume713
Issue number1
DOIs
Publication statusPublished - 2010

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