Charge exchange in solar wind-cometary interactions

Details Charge exchange in solar wind-cometary interactions Charge exchange in solar wind-cometary interactions

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...268..889g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 268, May 15, 1983, p. 889-898. Research supported by the Magyar Tudomanyos

Astronomy and Astrophysics

Astrophysics

9

Charge Exchange, Cometary Atmospheres, Solar Wind, Continuity Equation, Halley'S Comet, Heavy Ions, Ion Density (Concentration), Ionospheres, Pressure Distribution, Recombination Reactions, Water Vapor, Comets, Solar Wind, Interaction, Charged Particles, Ionosphere, Ions, Ionization, Density

Scientific paper

A simple model of a cometary spherically symmetrical atmosphere and ionosphere is considered. An analytic solution of the governing equations describing the radial distribution of the neutral and ion densities is found. The new solution is compared to the well-known solution of the equations containing only ionization terms. Neglecting recombination causes a significant overestimate of the ion density in the vicinity of the comet. An axisymmetric model of the solar wind-cometary interaction is considered, taking into account the loss of solar wind ions due to charge exchange. The calculations predict that for active comets, solar wind absorption due to charge exchange becomes important at a few thousand kilometers from the nucleus, and a surface separating the shocked solar wind from the cometary ionosphere develops in this region. These calculations are in reasonable agreement with the few observations available for the ionopause location at comets.

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