Top panel: upper row: Hα maps for the class 2 object IRAS F21453-3511. VIMOS continuum image and HST continuum images (i.e., H and I bands). Middle row: flux intensity, velocity dispersion σ (km s^-1), and velocity field v maps (km s^-1) for the main component. Lower row: respective maps for the broad component. Note the different FoV between the main and the broad components. The latter has been zoomed in since it covers a small area. The flux intensity maps are represented on logarithmic scale and in arbitrary flux units. All the images are centered using the Hα peak and the iso-contours of the Hα flux are overplotted. Bottom panel: Hα-[NII] observed spectra of IRAS F21453-3511 for a selected inner region (indicated by the coordinates in the top label using the same reference systems as in the top figure) where main and broad components coexist. The red curve shows the total Hα-[NII] components obtained from multi-component Gaussian fits. The green and blue curves represent respectively the main and broad components.