Left panel: Paα emission line in a central aperture with radius which corresponds to 3 × PSF. Here we use three components to fit the line. Right panel: Hα + [N II] emission lines complex in a central aperture with diameter 4″ from the S7 survey (Thomas et al. 2017). Here we use five components to fit these lines. The observed data is in black, the fitted components in blue and the full model in red.
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