BPT types of the spaxel spectra of the MaNGA galaxy M-8274-12703. Panel a: Map of the BPT types of the spaxel spectra. The BPT radiation types for individual spaxels are colour-coded. The circle shows the kinematic centre of the galaxy, the line indicates the position of the major kinematic axis of the galaxy, and the ellipse is the optical radius. Panel b: BPT diagram for the individual spaxels with H II-region-like (blue), intermediate (red), and AGN-like (black) spectrum classification. The solid and short-dashed curves mark the demarcation line between AGNs and H II regions defined by Kauffmann et al. (2003a) and Kewley et al. (2001), respectively. The long-dashed line is the dividing line between Seyfert galaxies and LINERs defined by Cid Fernandes et al. (2010).