χ2 contours as a function of Rout and i for all compact sources (red contours, 1 to 5σ by increasing width), overlaid on the surface density values in gray scale. The surface density contours are 5, 10, 20, 40, 80 and 160 g cm-2 (of dust+gas, assuming a gas-to-dust ratio of 100). The source name is indicated in each panel.
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