A study of C3HD in cold interstellar clouds

Details A study of C3HD in cold interstellar clouds A study of C3HD in cold interstellar clouds

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...326..924b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 326, March 15, 1988, p. 924-930.

Astronomy and Astrophysics

Astrophysics

46

Abundance, Deuterium, Interstellar Gas, Line Spectra, Molecular Clouds, Spectral Line Width, Astronomical Spectroscopy, Autocorrelation, Optical Thickness

Scientific paper

The 1(10)-1(01) transition of C3HD was detected at 19.418 GHz at twelve positions in cold, dark clouds, and the D hyperfine components were resolved in two sources (L1498 and TMC-1C) well enough to derive values for the D quadrupole coupling constants. Simultaneous observations of C3H2 in each source yield relative integrated line intensities in the range 0.10-0.18, from which relative C3HD/C3H2 abundances in the range 0.05-0.15 were derived. These are among the highest deuteration ratios yet observed. Within the limits of the observational and modeling uncertainties, it is possible to explain the derived C3HD/C3H2 ratios by ion-molecule chemistry if e is equal to about 3 x 10 to the -7th.

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