Visibility curves computed with Eq. (5) for and angular diameter of 2 mas and for the 3D (solid line), 1D (dotted line), and fully limb darkening (dash-dotted line) intensity profiles of Fig. 6. In top panels, the dotted and solid lines are almost overlying, while in bottom left panel the dotted line is almost overlying the dash-dotted one. A logarithm scale is used on y-axis. Synthetic visibilities in these plots are not realistic near the nulls but are intended only for model-to-model comparison.