Fig. 13
Sketch of galaxy evolution across the [NII]-based diagnostic diagram. Color contours represent sub-samples of the parent sample with increasing values (blue, green, red, and black) of the ratio between radio luminosity and luminosity of the Hα line as in Vitale et al. (2012). The arrows represent the trend of possible galaxy evolution from star-forming galaxies to Seyferts and LINERs.
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