Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...197..347g&link_type=abstract
Astrophysical Journal, vol. 197, Apr. 15, 1975, pt. 1, p. 347-350.
Astronomy and Astrophysics
Astrophysics
50
Carbon Monoxide, Interstellar Matter, Ionic Reactions, Nebulae, Transition Points, Interstellar Extinction, Ionizing Radiation, Molecular Interactions, Recombination Reactions, Ultraviolet Radiation
Scientific paper
Ionized carbon recombines as the ultraviolet radiation field is attenuated inside interstellar clouds. It is proposed that C(+) is transformed into CO, the CO being formed by ion-molecule reactions of C(+) with OH and H2O. The characteristic column density of hydrogen required for the transition is approximately 3 sextillion per sq cm. The C(+)-CO transition has important implications for observations of CO and the thermal properties of sufficiently thick clouds.
Glassgold Alfred E.
Langer William D.
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