Fig. 3
log [O iii]λ5007/Hβ and log [N ii]λ6583/Hα maps of NGC 5427. Also shown are the Hα contours with levels chosen to highlight the main Hα features. The data have been clipped using a signal-to-noise ratio of 5 between the line flux and the standard deviation of the nearby continuum multiplied by the FWHM of the line. Note that near the nucleus, the [N ii]λ6583/Hα ratios are enhanced in the inter-arm regions away from prominent H ii regions.
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