Publication Abstracts

Johnson et al. 1977

Johnson, D.R., F.J. Lovas, C.A. Gottlieb, E.W. Gottlieb, M.M. Litwak, P. Thaddeus, and M. Guelin, 1977: Detection of interstellar ethyl cyanide. Astrophys. J., 218, 370-376, doi:10.1086/155691.

Twenty-four millimeter-wave emission lines of ethyl cyanide (CH3CH2CN) have been detected in the Orion Nebula (OMC-1) and seven in Sgr B2. To derive precise radial velocities from the astronomical data, a laboratory measurement of the rotational spectrum of ethyl cyanide has been made at frequencies above 41 GHz. In OMC-1, the rotational temperature of ethyl cyanide is 90 K (in good agreement with other molecules), the local-standard-of-rest radial velocity is 4.5±1.0 km/s (versus 8.5 km/s for most molecules), and the column density is 1.8×1014 cm-2 (a surprisingly high figure for a complicated molecule). The high abundance of ethyl cyanide in the Orion Nebula suggests that ethane and perhaps larger saturated hydrocarbons may be common constituents of molecular clouds and have escaped detection only because they are nonpolar, or only weakly so.

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BibTeX Citation

  author={Johnson, D. R. and Lovas, F. J. and Gottlieb, C. A. and Gottlieb, E. W. and Litwak, M. M. and Thaddeus, P. and Guelin, M.},
  title={Detection of interstellar ethyl cyanide},
  journal={Astrophysical Journal},

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RIS Citation

ID  - jo08000d
AU  - Johnson, D. R.
AU  - Lovas, F. J.
AU  - Gottlieb, C. A.
AU  - Gottlieb, E. W.
AU  - Litwak, M. M.
AU  - Thaddeus, P.
AU  - Guelin, M.
PY  - 1977
TI  - Detection of interstellar ethyl cyanide
JA  - Astrophys. J.
JO  - Astrophysical Journal
VL  - 218
SP  - 370
EP  - 376
DO  - 10.1086/155691
ER  -

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