Resolving the Circumstellar Disk Around the Massive Protostar Driving
  the HH 80-81 Jet
  We present new high-angular resolution observations toward the driving source
of the HH 80-81 jet (IRAS 18162-2048). Continuum emission was observed with the
Very Large Array at 7 mm and 1.3 cm, and with the Submillimeter Array at 860
microns, with angular resolutions of ~0"1 and ~0"8 respectively. Submillimeter
observations of the sulfur oxide (SO) molecule are reported as well. At 1.3 cm
the emission traces the well-known radio jet, while at 7 mm the continuum
morphology is quadrupolar and seems to be produced by a combination of
free-free and dust emission. An elongated structure perpendicular to the jet
remains in the 7 mm image after subtraction of the free-free contribution. This
structure is interpreted as a compact accretion disk of ~200 AU radius. Our
interpretation is favored by the presence of rotation in our SO observations
observed at larger scales. The observations presented here add to the small
list of cases where the hundred-AU scale emission from a circumstellar disk
around a massive protostar has been resolved.
