A rotating disk around a high-mass young star

We report the discovery of a disk around the young high-mass star IRAS 2012 6+4104. Tn the NH3 (1, 1) and (2, 2) lines, we detected a flattened disklik e structure (6 " x 3 " or 10,000 x 5000 AU) roughly perpendicular to a bipo lar molecular outflow. A velocity gradient exists along the major axis of t he disk. The disk rotates faster toward the center. Our findings provide di rect verification that disks exist during the formation of high-mass stars.