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

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

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ap%26ss.175..165m&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 175, no. 1, Jan. 1991, p. 165-169.

Astronomy and Astrophysics

Astronomy

7

Abundance, Acrylonitriles, Cyanides, Ethyl Compounds, Interstellar Chemistry, Molecular Clouds, Hydrogenation, Radio Astronomy, Stellar Cores

Scientific paper

Interstellar ethyl-cyanide has been sought via its 2(02)-1(01) transition towards two cold, dark clouds, and upper limits of the total column densities of 3 x 10 to the 12th/sq cm and 2 x 10 to the 12th/sq cm for TMC-1 and L134N, respectively. The 2(02)-1(01) transition of vynil cyanide, previously identified in TMC-1 by Matthews and Sears (1983b), was also observed. The detection of vinyl cyanide and the nondetection 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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