Fig. 6
NLTE-corrected [S/Fe] abundance ratios as a function of metallicity in Galactic disk and halo stars (black dots: Caffau et al. 2005a; Jönsson et al. 2011; Takeda & Takada-Hidai 2011, 2012; Spite et al. 2011) and cluster stars (coloured symbols). All abundances are referenced to the adopted solar value of A(S) = 7.16 dex. The random errors of our GC stars are comparable to the symbol sizes. The maximum systematic error due to uncertainties of the stellar parameters is shown in the figure.
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