BPT diagrams log([OIII]/Hβ versus log([NII]/Hα) and log([OIII]/Hβ) versus log([SII]/Hα for UM 462 (upper panels) and IIZw40 (lower panels). The colour code represents the spaxels of the galaxies divided into the different log(Σ(Hα)) bins of < 38–37 (purple), < 39–38 (blue), < 40–39 (green), < 41–40 (cyan), < 42–41 (orange), and < 43–42 (red) in units of log erg s⁻¹ kpc⁻². In the BPT diagrams, we include the Kewley et al. (2001) (solid lines), Kauffmann et al. (2003) (dashed lines), and Schawinski et al. (2007) (dotted lines) model boundary lines, which divide regions dominated by star-forming HII, composite, and AGN/LINERs.