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AN UPPER LIMIT TO THE ACETYLENE ABUNDANCE TOWARD BN IN THE ORION MOLECULAR CLOUD

Abstract
A search for the acetylene (C2H2) nu3 infrared vibration-rotation absorption near 3 microns toward the Becklin-Neugebauer source in the Orion molecular cloud is reported. The relative abundance of C2H2/CO in the quiescent gas is less than 0.003.
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1989
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