DEUTERIUM HYPERFINE STRUCTURE IN INTERSTELLAR CYCLOPROPENYLIDENE $-d_{1} (C_{3}HO)$
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Date
1987
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Ohio State University
Abstract
The rotational transition $1_{10} - 1_{01}$ of the isotope $C_{3}HO$ of the ubiquitous interstellar ring molecule $C_{3}H_{2}$ was recently $identified^{1}$ in the interstellar molecular cloud TMC-1. New observations on a different sub-cloud of TMC-1 show fully resolved deuterium hyperfine structure of the same transition. The values of the deuterium quadrupole coupling parameters $eQ_{D}q_{zz} = 188 kHz, n = 0.053$, appear very normal for this unique molecule. The relative intensities indicate departures from local thermal equilibrium which will be discussed.
Description
$^{1}$ M. B. Bell, P. A. Feldman, H. E. Matthews, and L. W. Avery, Ap. J. (Letters) 311, 139 (1986).
Author Institution: Herzberg Institute of Astrophysics, National Research Council of Canada; Department of Physics and Astronomy, University of Massachusetts
Author Institution: Herzberg Institute of Astrophysics, National Research Council of Canada; Department of Physics and Astronomy, University of Massachusetts