On the production of positive molecular ions in cometary comas

Details On the production of positive molecular ions in cometary comas On the production of positive molecular ions in cometary comas

Aug 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ap%26ss..50..163t&link_type=abstract

Astrophysics and Space Science, vol. 50, no. 1, Aug. 1977, p. 163-171. Research supported by the Science Research Council.

Astronomy and Astrophysics

Astrophysics

1

Comet Heads, Ion Production Rates, Molecular Ions, Water, Cations, Clathrates, Kohoutek Comet, Solar Protons, Solar Wind

Scientific paper

Positively charged molecular ions, such as H2O(+), which have been observed in cometary comas, may be efficiently produced by the evaporation of positively charged clathrate grains of radii in the range of approximately 10 to the minus sixth to 10 to the minus fifth cm. Such grains may be expelled from nuclei of comets, along with gaseous molecules. Grain charging occurs via interaction with solar ultraviolet photons and/or solar wind protons. Observational data on the total quantities as well as the distribution of H2O and H2O(+) in cometary comas are shown to be in accord with detailed model calculations.

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