Continuum model of IRS 63 (top row) and IRS 43 (bottom row). The panels show from left to right the model fit to the radial brightness distribution of the SCUBA images and the model fit to the 1.1 mm SMA averaged visibility amplitudes. In the SCUBA profile plots, the data are shown with a red histogram and the model with a green histogram. The black dashed curve is a 2D Gaussian fit to the data. The vertical dashed line indicates the beam size. The visibility amplitudes of IRS 63 are the same as are shown in Fig. 2 but binned in much wider bins. In the visibility plots, the Fourier transform of the model is shown in blue.