Intersystem transitions of interstellar carbon monoxide toward zeta Ophiuchi

Details Intersystem transitions of interstellar carbon monoxide toward zeta Ophiuchi Intersystem transitions of interstellar carbon monoxide toward zeta Ophiuchi

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...432l.139f&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 432, no. 2, p. L139-L142

Astronomy and Astrophysics

Astronomy

22

Absorption Spectra, Carbon Monoxide, Electron Transitions, Interstellar Matter, Ultraviolet Spectra, Molecular Spectra, Ultraviolet Astronomy

Scientific paper

Absorption from seven intersystem (triplet-singlet) transitions of interstellar (12)CO were detected in ultraviolet spectra of zeta Oph. The observed equivalent widths are approximately consistent with the transitions' predicted f-values and the (12) CO column density derived from the weakest of the observed A-X bands. These unsaturated intersystem transitions provide the opportunity to measure the (12)CO column density for heavily reddened (dense) sight lines. Laboratory measurements of oscillator strengths more precise than available ones will be needed to derive accurate column densities.

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