Detection of Interstellar C 4D: Implications for Ion-Molecule Chemistry
Abstract
C4D has been detected in the cold interstellar cloud TMC-1 by means of the five strongest hyperfine components of the N = 2-1 transition at 17.6 GHz. An abundance ratio C4D/C4H = 0.0043 is found, in agreement with chemical models. By contrast, C3HD/C3H2 roughly 0.08 in TMC-1, nearly an order of magnitude larger than predicted. Implications of these discrepant ratios for ion-molecule chemistry are discussed.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1989
- DOI:
- 10.1086/185602
- Bibcode:
- 1989ApJ...347L..39T
- Keywords:
-
- Deuterium Compounds;
- Hydrocarbons;
- Interstellar Chemistry;
- Interstellar Matter;
- Molecular Clouds;
- Abundance;
- Electron Transitions;
- Molecular Spectra;
- Astrophysics;
- DEUTERIUM;
- INTERSTELLAR: MOLECULES;
- MOLECULAR PROCESSES