Fig. 2.

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Individual emission-line maps of four galaxies in our sample. Each galaxy was randomly selected from its corresponding morphological group. We also show an AGN host galaxy (fourth column). For each galaxy, we show an optical image from SDSS (top row), and the continuum-subtracted emission-line maps of [O III]λ5007, Hα, and [N II]λ6583. The emission-line maps are in units of normalised flux density.
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