Physics
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989phys...39..787m&link_type=abstract
Physica Scripta (ISSN 0031-8949), vol. 39, no. 6, June 1989, p. 787-793.
Physics
23
Auroral Zones, Earth Magnetosphere, Solitary Waves, Computerized Simulation, Ion Acoustic Waves, Ion Cyclotron Radiation, Viking Spacecraft
Scientific paper
Viking satellite observations and computer simulation experiments of solitary waves and weak double layers in the auroral plasma are compared. The lack of velocity versus amplitude relation and the measured speeds of the structures in the Viking data are inconsistent with the predictions of ion acoustic soliton theories. The best agreement between the Viking observations and theoretical predictions is obtained from the theory of nonlinear phase space ion hole instabilitity. This theory, however, is only one-dimensional, while the observations show that the solitary structures have a two- or three-dimensional shape with ion scale sizes that cannot be considered one-dimensional.
Bostrom Rolf
Holback Bengt
Koskinen Hannu
Malkki Anssi
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