Fig. 7
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[Ba/Eu] abundance ratios as a function of [Fe/H]. Filled triangles are stars compatible within uncertainties with [Ba/Eu]≤−0.7 (Solar System pure r-process according to A99). Open circles are stars with [Ba/Eu]>−0.7. Symbols are colour coded according to the Christlieb et al. (2004) classification for r-process enhanced stars. Blue, cyan, and magenta symbols represent r-II, r-I, and r-poor stars respectively. The black triangle indicates the star CES1237+1922.
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