Fig. 7

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Dust color as a function of fractional infrared excess. Panels a, b, and c are for STIS–F110W, STIS–F160W, and F110W–F160W, respectively. With a caveat that infrared excess and stellar luminosity are positively correlated in Sect. 4.3, there might be marginal trends of the STIS–NICMOS color being more neutral for disks with higher fractional infrared excess.
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