Solar-wind flow past a cometary ionosphere

Details Solar-wind flow past a cometary ionosphere Solar-wind flow past a cometary ionosphere

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.147...69b&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 147, no. 1, Aug. 1988, p. 69-90.

Astronomy and Astrophysics

Astrophysics

6

Cometary Atmospheres, Gas Dynamics, Ionospheric Disturbances, Solar Wind, Axisymmetric Flow, Charge Exchange, Neutral Particles, Particle Interactions, Resonance, Space Plasmas

Scientific paper

An axisymmetric gasdynamical model of interaction between the solar wind and comet atmospheres is formulated. Photoionization of the cometary neutral particles as well as their resonance charge-exchange are taken into account to determine the flow in the disturbed region containing three discontinuity surfaces (two shocks and the contact discontinuity). It is shown that these two processes are significant for many comets. The problem so formulated is solved numerically. A dependence of the obtained solutions on comets gas production, charge-exchange cross-section, photoionization time scale, and other parameters is studied. The numerical solutions are in good agreement with the experimental data obtained during the spacecraft missions to Comet Halley in March 1986.

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