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Fig. 20.


Abundances of [La/Fe] vs. [Eu/Fe] in barium stars (squares) and in CEMP-s (red triangles), CEMP-r (green triangles), and CEMP-rs (cyan triangles) stars. Data for CEMP stars are from Masseron et al. (2010). The four usual N-rich barium stars are shown as open blue squares. The short-dashed line through the CEMP-r stars corresponds to pure solar r-process (Goriely 1999), whereas the short-dashed line through the CEMP-s stars corresponds to pure s-process nucleosynthesis predictions for a 0.8 M star (Masseron et al. 2006) and a 3 M (long-dashed line; Goriely amp; Siess 2005) metal-poor AGB star.

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