Fig. 8.
Double-Gaussian profile fits. Line decomposition using a double-Gaussian profile for [Fe II] in NGC 7130 (left panel) and Brγ in NGC 2369 (right panel). Normalised spectra are shown as black crosses, while the fitted components and their sum are displayed in blue, red, and orange, respectively. Residuals are shown as green dots in the bottom panels. Dotted horizontal lines represent the 1σ value of the residuals.
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