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Measurement of the methyl cyanide E/A ratio in TMC-1
Y C Minh1, W M Irvine, M Ohishi
1Korea Astronomy Observatory, Whaam-dong, Yusong, Korea.
Astronomy and Astrophysics
|January 1, 1993
Abstract:
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 NE/NA approximately 0.75 +/- 0.10. The total methyl cyanide column density is Ntotal = 5 10(12) cm-2 toward TMC-1, in agreement with earlier results from the J=1-0 lines.