Vogt, Frederic; Dopita, Michael; Kewley, Lisa; Sutherland, Ralph; Scharwachter, Julia; Basurah, Hassan; Ali, Alaa; Amer, Morsi A.
Two-dimensional (2D) line ratio diagnostic diagrams have become a key tool in understanding the excitation mechanisms of galaxies. The curves used to separate the different regions - H II-like or excited by an active galactic nucleus (AGN) - have been refined over time but the core technique has not evolved significantly. However, the classification of galaxies based on their emission line ratios really is a multi-dimensional problem. Here we exploit recent software developments to explore the...[Show more]
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