Fig. 6.
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Diagram of [O III] /Hβ versus [NeIII]/[OII] diagram. The black dashed lines show the boundary between AGN and star-forming galaxies from Backhaus et al. (2022). The light blue and orange points show star-forming and AGN photoionisation models from Feltre et al. (2016) and Gutkin et al. (2016), respectively. There is a significant overlap between AGN and star forming galaxies in this diagram, making it unreliable to select AGN.
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