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Fig. 2.

Panel a: log (R23 − 0.08O32)−Te(O II) relation for SFGs. Panel b: relation between the extinction-corrected [O II]λ3727/Hβ and [N II]λ6584/Hβ flux ratios. The solid line corresponds to [O II]λ3727 = 20 × [N II]λ6584. Symbols in both panels are as in Fig. 1.
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