Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...103..154f&link_type=abstract
Astronomy and Astrophysics, vol. 103, no. 1, Nov. 1981, p. 154-159.
Astronomy and Astrophysics
Astrophysics
60
Comets, Forbidden Transitions, Line Spectra, Oxygen Spectra, Astronomical Spectroscopy, Carbon Dioxide, Photodissociation, Solar Radiation, Water Vapor, Comae, Absorption, Comparisons, Ammonia, Intensity, Production Rate, Abundance, Comets, Oxygen, Observations, Bradfield Comet, Iue, Data, International Ultraviolet Explorer, Spectrographs, Source, Emissions, Photodissociation, Water, Molecules, Lyman-Alpha Radiation, Photons, Carbon Dioxide, Spectrum, Fluorescence, Diagrams, Collisions, Distance, Brightness
Scientific paper
High spatial resolution observations of comet Bradfield (1979X) with the IUE spectrograph have made it possible to tentatively identify a feature at 2972 A as the 1S-3P forbidden transition of oxygen atoms. It is shown here that the most likely source of this emission is the photodissociation of water molecules, mainly by solar Lyman-alpha photons, but that a significant contribution of CO2 cannot be excluded.
Feldman Paul D.
Festou Michel
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