A LAMBDA=1.3 MILLIMETER APERTURE SYNTHESIS MOLECULAR LINE SURVEY OF ORION KLEINMANN-LOW

We present a 1 ''.3 spatial resolution interferometric spectral line s urvey of the core of the Orion molecular cloud, obtained with the OVRO millimeter array. Covering 4 GHz bandwidth in total, the survey conta ins similar to 100 emission lines from 18 chemical species. The spatia l distributions of a number of molecules point to source I near the IR c2 complex as the dominant energy source in the region but do not rule out the presence of additional lower luminosity objects. At arcsecond resolution, the offsets between dust emission and various molecular t racers suggest that the spectacular ''hot core'' emission in the Orion core arises via the heating and ablation of material from the surface s of very high density clumps located greater than or similar to 500 A U from source I and traced by the dust emission. We find no evidence f or a strong internal heating source within the hot core condensation(s ).