A study of C3HD in cold interstellar clouds

descriptionPublicationkeyboard_double_arrow_right Article 01 Mar 1988Embargo end date: 26 Apr 2024 United States English Publisher:American Astronomical SocietyJournal:The Astrophysical Journal, volume 326, page 924 (issn: 0004-637X, eissn: 1538-4357,

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Authors: BELL, MB; AVERY, LW; MATTHEWS, HE; FELDMAN, PA; WATSON, JKG; MADDEN, SC; Irvine, William M.;

doi: 10.1086/166150 , 10.7275/2409

pmid: 11538339

A study of C3HD in cold interstellar clouds

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Abstract

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.

The published version is located at http://adsabs.harvard.edu/doi/10.1086/166150

Country

United States

Related Organizations

National Research Council Canada
Canada
University of Massachusetts Amherst
United States
Herzberg Institute of Astrophysics
Canada

Keywords

Astrophysics and Astronomy, Extraterrestrial Environment, Astronomy, Spectrum Analysis, Astronomical Phenomena, Molecular and Optical Physics, Models, Theoretical, Interstellar Medium and the Galaxy, Deuterium, Atomic, Stars, Hydrocarbons, Interstellar Chemistry

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