Title

UPPER LIMITS FOR THE ETHYL-CYANIDE ABUNDANCES IN TMC-1 AND L134N - CHEMICAL IMPLICATIONS

Publication Date

1991

Journal or Book Title

ASTROPHYSICS AND SPACE SCIENCE

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.

Comments

The published version is located at http://www.springerlink.com/content/v4h3353528000602/

Volume

175

Pages

165-169

Issue

1

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