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We report high sensitivity sub-arcsecond angular resolution observations ofthe massive star forming region DR21(OH) at 3.6, 1.3, and 0.7 cm obtained withthe Very Large Array. In addition, we conducted observations of CH3OH 44 GHzmasers. We detected more than 30 new maser components in the DR21(OH) region.Most of the masers appear to trace a sequence of bow-shocks in a bipolaroutflow. The cm continuum observations reveal a cluster of radio sources; thestrongest emission is found toward the molecular core MM1. The radio sources inMM1 are located about 5" north of the symmetry center of the CH3OH outflow, andtherefore, they are unlikely to be associated with the outflow. Instead, thedriving source of the outflow is likely located in the MM2 core. Although basedon circumstantial evidence, the radio continuum from MM1 appears to tracefree-free emission from shock-ionized gas in a jet. The orientation of theputative jet in MM1 is approximately parallel to the CH3OH outflow and almostperpendicular to the large scale molecular filament that connects DR21 andDR21(OH). This suggests that the (accretion) disks associated with theoutflows/jets in the DR21 - DR21(OH) region have symmetry axes mostlyperpendicular to the filament.

Radio Continuum and Methanol Observations of DR21(OH)