Visibilities for ground state (top) and active state (bottom) models with an inclination of 45° as a function of stellar luminosity for the H, K, L, M, and N bands (solid; left axis) for baseline orientations along the major (left) and minor axis (right) of the disk image. The corresponding fluxes in the photometric V and N bands are also shown (dashed; right axis). The V- and N-band fluxes are normalized with respect to the reference model with L = L₀. The inner radius of the disk is set to R_in = 1 au for all models (see Sect. 3.2 for details).