CEMP-s stars: AGB yield predictions and thermohaline mixing

Bisterzo, S.; Gallino, R.; Straniero, O.; Ivans, I. I.; Preston, G. W.; Aoki, W.; O'Shea, BW; Heger, A; Abel, T
2008
FIRST STARS III
CS 29497-030 and CS 31062-050 belong to a sample of C-rich, s-process rich and extremely metal-poor stars (CEMP-s+r). To explain the s-process enrichment, we considered these stars to be extrinsic asymptotic giant branch (AGB) stars, belonging to binary systems where the more massive AGB companion polluted the observed star (of similar to 0.8M center dot) with efficient stellar winds. To explain the r-process enrichment, we assumed that the parental cloud was already enriched in r-process elements.