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Upper limits for the ethyl-cyanide abundances in TMC-1 and L134N: Chemical implications

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Abstract

We have sought interstellar ethyl-cyanide via its 202–101 transition towards two cold, dark clouds and report upper limits of the total column densities of 3×1012cm−2 and 2×1012cm−2 for TMC-1 and L134N, respectively. We also observed the 202–101 transition of vinyl cyanide previously identified in TMC-1 by Matthews and Sears (1983b). The detection of vinyl cyanide and the non-detection of ethyl cyanide in TMC-1 are consistent with gas phase ion-molecule chemical models, and there is thus no necessity of invoking grain surface synthesis for vinyl cyanide in cold clouds.

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Authors and Affiliations

  1. Five College Radio Astronomy Observatory, Department of Physics and Astronomy, Lederle Graduate Research Center, University of Massachusetts, Amherst, MA, USA

    Y. C. Minh & W. M. Irvine

  2. Nobeyama Radio Observatory Nobeyama, Minamisaku, Nagano, Japan

    W. M. Irvine

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  1. Y. C. Minh
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  2. W. M. Irvine
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Minh, Y.C., Irvine, W.M. Upper limits for the ethyl-cyanide abundances in TMC-1 and L134N: Chemical implications. Astrophys Space Sci 175, 165–169 (1991). https://doi.org/10.1007/BF00644434

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  • DOI: https://doi.org/10.1007/BF00644434

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