Fig. 11.
Diagnostic BPT diagram of [OIII]5007/Hβ vs. [NII]6584/Hα for individual emission line regions in NGC 6240. The dashed lines and solid lines are the dividing lines between AGN (upper right) and HII-region galaxies (lower left) (Kauffmann et al. 2003; Kewley et al. 2006). The dotted line is the dividing line between Seyfert and LINER nuclei.
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