MEASUREMENT OF THE METHYL CYANIDE E/A RATIO IN TMC-1
Journal or Book Title
ASTRONOMY AND ASTROPHYSICS
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.
MINH, YC; Irvine, William M.; OHISHI, M; ISHIKAWA, S; SAITO, S; and KAIFU, N, "MEASUREMENT OF THE METHYL CYANIDE E/A RATIO IN TMC-1" (1993). ASTRONOMY AND ASTROPHYSICS. 228.
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