The Rotational Spectrum of the Carbon Chain Radical HCCCO
Abstract
The bent chain radical HCCCO has been identified from laboratory measurement of 248 rotational transitions between 81 and 400 GHz. Because two molecules with the same heavy atom backbone, CCCO and HCCCHO, have already been observed in TMC-1, HCCCO is a good candidate for detection in molecular clouds and circumstellar envelopes. Rotational transition frequencies for the Ka = 0 manifold are tabulated, as well as precise values for the rotational, centrifugal distortion, and spin-rotation constants, which allow calculation of the entire rotational spectrum into the far-IR.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 1992
- DOI:
- 10.1086/186284
- Bibcode:
- 1992ApJ...386L..27C
- Keywords:
-
- Far Infrared Radiation;
- Free Radicals;
- Hydrocarbons;
- Molecular Clouds;
- Rotational Spectra;
- Stellar Envelopes;
- Interstellar Gas;
- Millimeter Waves;
- Molecular Structure;
- Atomic and Molecular Physics;
- ISM: MOLECULES;
- MOLECULAR DATA;
- MOLECULAR PROCESSES