A 8.8--50GHz Complete Spectral Line Survey toward TMC-1 I. Survey Data
Abstract
We completed the first spectral line survey toward a cold, dark cloud TMC-1 (cyanopolyyne peak) in a frequency range between 8.8 and 50.0GHz by the 45-m radio telescope of Nobeyama Radio Observatory. We detected 414 lines of 38 molecular species including 11 new molecules, such as C6H, CCO, C3O, CCS, C3S, HNCCC, HCCNC, HC3NH+, HCCCHO, CH2CN, and cyclic C3H, (c-C3H), which were previously reported; only one significant line, U49536, remains unidentified. 177 out of 414 lines are reported for the first time. Some half of the detected molecules are linear carbon-chain species and their derivatives. We also discovered three new rarer isotopomers: CC 34S, C3, 34S, and HDCS. Spectral charts are presented together with the observed line parameters of all detected lines. Improved molecular constants of several carbon-chain molecules obtained during the course of identification are also presented.
- Publication:
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Publications of the Astronomical Society of Japan
- Pub Date:
- February 2004
- DOI:
- 10.1093/pasj/56.1.69
- Bibcode:
- 2004PASJ...56...69K
- Keywords:
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- ISM: abundances;
- ISM: individual (TMC-1);
- ISM: molecules