Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...256..331f&link_type=abstract
Astrophysical Journal, Part 1, vol. 256, May 1, 1982, p. 331-338.
Astronomy and Astrophysics
Astrophysics
27
Carbon Dioxide, Comets, Iue, Molecular Ions, Ultraviolet Spectra, Fluorescence, Hydroxyl Radicals, Photoionization, Spatial Distribution, Ultraviolet Spectrometers, Comets, Ultraviolet, Wavelengths, Carbon Dioxide, Ions, Iue, Spectra, International Ultraviolet Explorer, Spectrographs, Bradfield (1979X) Comet, Seargent (1978Xv) Comet, Resonance, Fluorescence, Observations, Features, Emissions, P/Encke Comet, P/Tuttle (1980H) Comet, Meir (1980Q) Comet, Panther (1980U) Comet, Comparisons, Models, Distribution,
Scientific paper
Eight comets are studied with the International Ultraviolet Explorer spectrographs. The existence of the CO2(plus) ion in a comet is confirmed through the presence of the 2890 A doublet in at least three of these objects. Spatial and spectral resolution obtained in comets Bradfield (1979 X) and Seargent (1978 XV) permit a discussion of the production mechanisms of this ion. The spectra reveal new ionic features in the 3100-3400 A range, which are attributed to resonance fluorescence of the Fox-Duffendack-Barker system of the CO2(plus) ion and, near 3350 A, to the OH(plus) ion.
Feldman Paul D.
Festou Michael C.
Weaver Harold A.
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