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High-resolution mapping observations of TMC-1 using the lines of CCS, C3S, C(S-32), and C(S-34) molecules are reported. The source was also observed at HC3N, HC5N, NH3, C4H, and HCS(+) lines with high signal resolution for a systematic comparison with sulfur-containing carbon-chain molecules. Accurate molecular distributions are derived, and the origin of chemical differences in TMC-1 are discussed with reference to recent observations of dark cloud cores and chemical model calculations.
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Hirahara et al. (1992) studied this question.
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