SIMBAD references

1995A&A...298..213M - Astronomy and Astrophysics, volume 298, 213-218 (1995/6-1)

Measurements of the H213CO ortho/para ratio in cold dark molecular clouds.

MINH Y.C., DICKENS J.E., IRVINE W.M. and McGONAGLE D.

Abstract (from CDS):

H213CO has been detected for the first time toward cold dark molecular clouds using the NRAO 12m telescope. The H213CO ortho/para abundance ratio R for B335, which we report as R∼1.7, suggests equilibrium at the local kinetic temperature and appears to be distinctly different from that for both TMC-1 and L134N, where R is close to or higher than the statistical value 3. Since only B335 among the observed positions includes an imbedded IR source, this difference may result from heating of the grain surfaces, providing the energy necessary for desorption of formaldehyde formed on the grains.

Abstract Copyright:

Journal keyword(s): ISM: abundance - ISM: molecules - ISM: clouds - ISM: individual: Barn 335 - radio lines: ISM

Simbad objects: 3

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