New AGN diagnostic diagrams based on the [OIII]λ4363 auroral line

Open Access

Fig. 2.

Same as Fig. 1, but for the line ratios [OIII]λ4363/Hγ vs [Ne III]λ3869/[OII]λ3727. Based on the distribution of observational samples and models, this diagnostic diagram also identifies a region that can be populated only by AGN.

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