Measurement of the methyl cyanide E/A ratio in TMC-1

Details Measurement of the methyl cyanide E/A ratio in TMC-1 Measurement of the methyl cyanide E/A ratio in TMC-1

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...267..229m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 267, no. 1, p. 229-232.

Astronomy and Astrophysics

Astrophysics

11

Cyanides, Interstellar Matter, Methyl Compounds, Molecular Clouds, Abundance, Galactic Nuclei

Scientific paper

We have observed the methyl cyanide (CH3CN) J = 2-1 K = 0 and 1
transitions toward the cyanopolyyne peak of TMC-1 and have derived an
E/A (ortho/para)abundance ratio N(E)/N(A) = 0.75 +/- 0.10. The total
methyl cyanide column density is N(total) = 5 x 10 exp 12/sq cm toward
TMC-1, in agreement with earlier results from the J = 1-0 lines.

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