Fig. 5.

Top panel: posterior PDFs relative to 12 + log(O/H), log(q), and E(B − V) inferred with a Gaussian (red) and a flat (blue) prior on the ionisation parameter, respectively, with D13 models, for a single spaxel of the galaxy 7990−12703. Bottom panel: posterior PDFs relative to the three parameters, inferred only taking into account [O II]λλ3726,29, Hβ and [O III]λλ4959,5007 (i.e. R23, in green), and Hβ, [O III]λλ4959,5007, [N II]λλ6548,84 and Hα, (i.e. O3N2, in orange), respectively.
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