Same as Figs. 1 and 2, but for an edge-on orientation of the disk. The position of the planet is indicated by the red arrow in each image. The flux is given in arbitrary units and displayed in a logarithmic stretch from zero to peak value for model sequence I, from zero to 1/2 of the peak value at wavelengths up to 24   μm for model sequence II and III, and at longer wavelengths form zero to 1/2 of the peak value for model sequence II and to the peak value for model sequence III. Note that a disk without a planet would show a smooth, featureless radial surface brightness distribution (besides the possible signpost of inner and outer disk radius).