Top 3 panels: interferometric Brγ differential phases, visibilities, and line profile for the reference model. Calculations were made for ν_obs = 1 m pc^-1 (target marginally resolved), and baseline orientation parallel to the disk equator. Bottom panels: model images for different spectral channels (as indicated in the upper panels) at different spatial scales. The photocenter position is indicated by a black cross. The disk inclination angle is i = 45°. Absorption bands can be identified at velocities b) and c) but they little alter the stellar flux in the line-of-sight.