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A study of C3HD in cold interstellar clouds.

作者信息

Bell M B, Avery L W, Matthews H E, Feldman P A, Watson J K, Madden S C, Irvine W M

机构信息

Herzberg Institute of Astrophysics, National Research Council of Canada.

出版信息

Astrophys J. 1988 Mar 15;326(2):924-30. doi: 10.1086/166150.

DOI:10.1086/166150
PMID:11538339
Abstract

We have detected the 1(10)-1(01) transition of C3HD at 19.418 GHz at twelve positions in cold, dark clouds and resolved the D hyperfine components 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 we derive relative [C3HD]/[C3H2] abundances in the range 0.05-0.15. 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-] approximately 3 x 10(-7).

摘要

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