NGC7538S - a High-Mass Protostar with a Massive Rotating Disk

Abstract: We report the detection of a massive rotating disk around the high-mass Class0 candidate NGC 7538S. The disk is well-resolved with BIMA (HPBW =3.7") in 3.4mm continuum and in H13CN J = 1 - 0. It is seen nearly edge on and has a sizeof ~ 30,000 AU. A young, powerful outflow perpendicular to the rotating disk ismapped in SiO J ..