2001ApJ...550L..71J

We have detected continuum emission at 450 µm, 850 µm, and 1.35 mm from SS Lep (or 17 Lep), 3 Pup, and probably BM Gem, respectively, which are likely or confirmed binary systems consisting of at least one evolved giant. The observed submillimeter fluxes are probably emitted by grains rather than ionized gas. The fluxes are larger than those expected from a ``normal'' dusty wind; the dust temperature is ≤70 K within 6" of the stars. To explain why grains are so cold near the star, we suggest that the emission at λ≥450 µm is produced by particles as large as 0.1 mm in radius and that these large particles probably have grown by coagulation in circumbinary orbiting disks with masses ≥5x10²⁸ g.