Abstract
Thirty-four stars were surveyed for 2.6-mm CO emission and 49 for 3.4-mm HCN emission. The CO and HCN emission lines were detected in the directions of the carbon stars IRC+10216, IRC+30219, and possibly IRC+00382. The diameter of the CO source in the direction of IRC+10216 was measured to be in equilibrium 2- .3, which is larger than expected for this stellar source. The HCN emiasion source near IRC+10216 was less than ~40- in diameter. Extended CO emission sources were also found in the directions of the stars R Mon and T Tau. The infrared source IRC + 40091 (LkH alpha -- 101) near the H II region S222 was also found to have CO emission. (auth)
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