Deuterated C3H2 as a clue to deuterium chemistry.
Abstract
The authors detected C3HD towards several sources in four rotational lines, at 19, 79, 104 and 107 GHz. The relative integrated intensities of the 212-101 lines of C3HD and C3H2 are found in a ratio 1:5, indicating a high deuterium fractionation ratio for cyclopropenylidene. The detection of the 13C isotope of C3H2 at the same position allows a determination of the optical thickness (≅3) of the line. The detection of such a large enhancement in the deuterated form of C3H2 very strongly suggests that a molecular ion is the chemical precursor of the molecules. A consideration of the amount of the enhancement relative to that in other molecules suggests that the precursor ion is C3H3+.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- February 1987
- Bibcode:
- 1987A&A...173L...1G
- Keywords:
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- Abundance;
- Cyclic Hydrocarbons;
- Deuterium;
- Interstellar Chemistry;
- Molecular Clouds;
- Astronomical Spectroscopy;
- Chemical Fractionation;
- Line Spectra;
- Molecular Ions;
- Astrophysics