Publication Abstracts

Gottlieb et al. 1985

Gottlieb, C.A., J.M. Vrtilek, E.W. Gottlieb, P. Thaddeus, and A. Hjalmarson, 1985: Laboratory detection of the C3H radical. Astrophys. J., 294, L55-L58, doi:10.1086/184508.

Millimeter-wave lines of the C3H radical, including six of the lines observed in space, were detected in a laboratory glow discharge through a flowing mixture of C2H2, He, and CO. Each of the 10 rotational transitions measured, five between 98 and 185 GHz in the 2Pi1/2 ladder and five between 80 and 194 GHz in the 2Pi3/2 ladder, is split by lambda-type doubling, and all but three possess resolved hyperfine structure. The excellent agreement between the fine-structure, rotation, lambda-doubling, and hyperfine constants derived from the laboratory data and from the astronomical observations conclusively confirms the identifications in IRC +10216 and TMC-1 by Thaddeus and colleagues (1985). An accurate set of spectroscopic constants, which allow calculation of the entire radio spectrum of C3H to a radial velocity of 0.1 km/s, was derived from a simulataneous fit to the laboratory frequencies and to the well-resolved hfs observed in the narrow-line astronomical source TMC-1.

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BibTeX Citation

  author={Gottlieb, C. A. and Vrtilek, J. M. and Gottlieb, E. W. and Thaddeus, P. and Hjalmarson, A.},
  title={Laboratory detection of the C3H radical},
  journal={Astrophys. J.},

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RIS Citation

ID  - go06100c
AU  - Gottlieb, C. A.
AU  - Vrtilek, J. M.
AU  - Gottlieb, E. W.
AU  - Thaddeus, P.
AU  - Hjalmarson, A.
PY  - 1985
TI  - Laboratory detection of the C3H radical
JA  - Astrophys. J.
VL  - 294
SP  - L55
EP  - L58
DO  - 10.1086/184508
ER  -

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