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Fig. 1


[Ba/H] and [Eu/H] of metal-poor stars with [Fe/H] < −1 from the SAGA observational database. Grey and red dots indicate stars with [Eu/Fe] ≤ 1 and [Eu/Fe] > 1, respectively. Stars with [Ba/Fe] > 1 and [Ba/Eu] > 0 are shown as blue open squares. The + symbol in the bottom right corner shows the average observational uncertainty. The solar [Ba/Eu] ascribed to the r- and s-processes are shown as dotted lines (Goriely 1999; Masseron et al. 2006). The dashed line represents [Ba/Eu] = 0.

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