Top panel: upper row: Hα maps for the class 2 object IRAS F04315-0840. 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 because it covers a small area. The flux intensity maps are represented on a 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 F04315-0840 for selected inner regions which are indicated in the top label using the same reference system as in the top panel where the 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.