Fig. B.1.
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Comparison of metallicity measurements (i.e., 12+log(O/H)). Left: using fixed radial metallicity gradient using the O3N2 calibration (that uses the [OIII]λ5007, [NII]λ6584, Hβ and Hα lines, see Pettini & Pagel 2004). Middle: for individual HII regions using the PG16S calibration (that uses the [OIII]λ4959,5007, [NII]λ6584,6584, [SII]λ6717,6731, Hβ and Hα lines, see Pilyugin & Grebel 2016). Right: measurements from the middle panel converted to O3N2 calibration using the third panel Figure B1 in the Appendix of De Vis et al. (2019).
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