Left: fits of different models to the visibility measurements at a representative wavelength. The visibility data are plotted versus spatial frequency and are color-coded by visual light phase. Right: the fitted circular fully limb-darkened disk diameter, θ_FDD, as function of wavelength for the full data set and selected pulsation phases. The corresponding plots for W Hya can be found in Paper I (Figs. 6 and 8, respectively).