Equivalent widths of gravity sensitive lines of Na I (1.138 μm) and K I (1.169 μm, 1.177 μm, 1.243 μm, 1.253 μm) computed on the SINFONI spectra and on reference spectra (see Fig. 10 for details). Spectra of objects not reported in this plot suffered from a S/N that is too low or from artefacts that prevented the EW from being computed.