On the left [Ba/Fe], in the center [Sr/Fe], on the right [Sr/Ba], vs. [Fe/H]. Upper, center, and lower panels for “r-”, “as-”, and “fs-”models respectively. The density plot is the distribution of simulated long-living stars for our models; the density is on a log scale, normalized to the peak of the distribution (see bar over the Fig. 2 for the color scale). Superimposed, we show the abundances ratios for halo stars (data from Frebel 2010). The symbols are the same as in Fig. 3.
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