Zinc in the Sculptor dwarf spheroidal galaxy
  From ESO VLT/FLAMES/GIRAFFE spectra, abundance measurements of Zn have been
made in $\approx$100 individual red giant branch (RGB) stars in the Sculptor
dwarf spheroidal galaxy. This is the largest sample of individual Zn abundance
measurements within a stellar system beyond the Milky Way. In the observed
metallicity range, $-2.7\leq\text{[Fe/H]}\leq-0.9$, the general trend of Zn
abundances in Sculptor is similar to that of $\alpha$-elements. That is,
super-solar abundance ratios of [Zn/Fe] at low metallicities, which decrease
with increasing [Fe/H], eventually reaching subsolar values. However, at the
higher metallicities in Sculptor, $\text{[Fe/H]}\gtrsim-1.8$, we find a
significant scatter, $-0.8\lesssim\text{[Zn/Fe]}\lesssim+0.4$, which is not
seen in any $\alpha$-element. Our results are consistent with previous
observations of a limited number of stars in Sculptor and in other dwarf
galaxies. These results suggest that zinc has a complex nucleosynthetic origin,
behaving neither completely like an $\alpha$- nor an iron-peak element.
