Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...394..652k&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 394, no. 2, Aug. 1, 1992, p. 652-661. Research supported by Israel Academy
Astronomy and Astrophysics
Astronomy
5
Astronomical Models, Cavities, Halley'S Comet, Spaceborne Astronomy, Comet Nuclei, Magnetic Field Configurations, Photoionization, Recombination Reactions, Velocity Distribution
Scientific paper
In this paper a unidimensional model for the formation of magnetic cavities in comets is presented. This model includes ion-neutral friction, dissociative recombination, photoionization, and thermal energetic ion pressure coupled with a nonconstant velocity profile which was chosen to simulate the flow pattern. The model explains the thermal ion population profile. Conditions under which a cavity may not form are discussed. In the paper the roles of the various processes are studied, and it is shown that focusing on ion-neutral friction as the major process in the creation of the cavity is not in general correct. In the last part of the paper, the limitations of the model are delineated.
Eviatar Aharon
Goldstein Raymond
Klopman Z.
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