Abundance ratios of [Ba/Eu] and [Ba/Y]_s as a function of [Fe/H], respectively, shown in the left and right panels. Dashed lines at [Ba/Eu] 0.70 dex and −0.70 dex indicate the ratio for a full s-process and full r-process enrichment. The dashed line at [Ba/Eu] 0.00 dex displays the solar ratio. Magenta diamonds in the right-hand panel show dwarf galaxies results taken from Suda et al. (2008). Other symbols and colours follow the description given in Fig. 12.