[Ba/Fe] vs. [Fe/H] results; on the left the model for an r-process contribution only from the “standard” site, on the right the r-model, where both “standard” and “extended” contributions are considered. 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.