Millimeter Dust Emission in the GQ Lup System

We present SubMillimeter Array observations of the GQ Lup system at 1.3 mm wavelength with 0farcs4 (~60 AU) resolution. Emission is detected from the position of the primary star, GQ Lup A, and is marginally resolved. No emission is detected from the substellar companion, GQ Lup B, 0farcs7 away. These data, together with models of the spectral energy distribution, suggest a compact disk around GQ Lup A with mass ~3 M _Jup, perhaps truncated by tidal forces. There is no evidence for a gap or hole in the disk that might be the signature of an additional inner companion body capable of scattering GQ Lup B out to ~100 AU separation from GQ Lup A. For GQ Lup B to have formed in situ, the disk must have been much more massive and extended.