Left panel: non-parametric analysis of the [O II]3727 doublet emission-line profile for XID5395 (red histogram) as observed in the VIMOS spectrum. The solid curve is the fit to the profile obtained with a combination of two Gaussian lines (not shown here; see also Fig. 6). The vertical solid lines show different percentiles to the flux contained in the overall emission-line profile (v05 and v95) as labelled. The long-dashed line indicates the v = 0 systemic as determined in Sect. 4.1. Right panel: same as the left panel, but around the [O III]4959,5007 emission lines, from the SINFONI spectrum, extracted from an aperture of 1′′diameter (see Sect. 4.1 for details). A clear asymmetry is present in both the [O II] and [O III] emission lines with similar kinematics parameters (as labelled). The yellow shaded region highlights the wavelengths interval corresponding to the peak of the [O III] emission (+/−300 km s-1) in which the map shown in Fig. 7 (left) is integrated.
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