ORION-B (NGC-2024) .3. BIMA SO JK=2(2)-]1(1) OBSERVATIONS - EVIDENCE FOR PECULIAR SULFUR CHEMISTRY

We present aperture synthesis maps of SO J(K) = 2(2) --> 1(1) emission at 86.093938 GHZ of the molecular cloud Orion B obtained from combined BIMA/NRAO 12 m data. The spatial resolution is 11" x 7" and the velocity resolution is 0.54 km s-1. The maps show fine structure in the dense molecular core, the main features being two relatively compact components aligned with the long, quiescent, NS-oriented ridge of previous maps. Most notable, however, is the approximately 1-2 km s-1 blueshift of this line with respect to other high-density tracers of the main core. implications of these data for the chemistry of SO in dense clouds are discussed.