Left panel: results for [Eu/Fe] vs. [Fe/H] for model NS00. This model has a delay time for the NSMs of 1 Myr, constant Eu production of 5 × 10^-6 M_⊙ per merging event, and no Eu from SNeII. The density plot is the distribution of simulated long-living stars for our model (see the bar below the figure for the colour scale). The long-living stars formed without Eu (formally [Eu/Fe] = −∞) are shown at [Eu/Fe] = −2.4. The model predictions are compared to data collected in Frebel (2010a); we show as black dots stars with [C/Fe] < 0.9 (to avoid binary enrichment), the open dots are stars with no carbon measurement. Central panel: same as left panel, but for model NS01. This model has a delay time for the NSMs of 10 Myr, constant Eu production of 5 × 10^-6 M_⊙ per merging event, and no Eu from SNeII. Right panel: again same as for the left panel, but for model NS02. This model has a delay time for the NSMs of 100 Myr, constant Eu production of 5 × 10^-6 M_⊙ per merging event, and no Eu from SNeII.