CO and CS in the Orion Nebula

Abstract

We present maps, in 12C16O, 13C16O, and 12C32S line emission, of the central ( 20') portion of the Orion A molecular cloud. The dominant feature in the maps is a dense 4' x 9' emission "ridge" which appears to be rotating about an east-west axis running through the position of the Kleinmann-Low infrared source. We argue that our line profiles and maps are most readily understood in terms of simple, systematic, radial velocity structure in the cloud. Subject headings: infrared sources - molecules, interstellar - Orion Nebula