Fig. 1

Panel a: BPT diagram for our sample of MaNGA galaxies. The filled circles are individual spaxels. Solid and long-dashed curves mark the demarcation line between AGNs and H II regions defined byKauffmann et al. (2003) and Kewley et al. (2001), respectively. The short-dashed line is the dividing line between Seyfert galaxies and LINERs defined by Cid Fernandes et al. (2010). Panel b: BPT diagram for H II regions in nearby galaxies. Panels c and d: BPT diagrams for fibre spectra of the SDSS galaxies with line measurements from the catalogues SDSS-A and SDSS-B, respectively.
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