Best-fitting model (part nine) plotted against the observations from the VLTI/AMBER spectro-interferometer. In each panel, the observed squared visibility V² is plotted with red triangles; the model corresponding to parameters listed in Table 11 is denoted with black points. Residuals of the fit are shown below each panel. The mean acquisition date, the corresponding mean reduced heliocentric Julian date, and the instrument are indicated above each panel.