Physics
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981p%26ss...29..843l&link_type=abstract
Planetary and Space Science, vol. 29, Aug. 1981, p. 843-849.
Physics
7
Earth Magnetosphere, Interplanetary Magnetic Fields, Magnetohydrodynamic Stability, Solar Terrestrial Interactions, Solar Wind, Lorentz Force, Magnetic Flux, Magnetopause, Plasma Layers, Plasma Oscillations, Time Dependence
Scientific paper
It is suggested that the plasma irregularities present in the solar wind are plasmoids, and that these plasmoids differ from ideal MHD filaments. Their 'skin' is not infinitely thin but has a physical thickness which is determined by the gyromotion of the thermal ions and electrons. In addition, they are of finite extent and their magnetic flux is interconnected with the interplanetary magnetic flux, and when they penetrate into the magnetosphere their magnetic field lines become rooted in the ionosphere. The external Lorentz force acting on their boundary surface depends on the orientation of their magnetic moment with respect to the external magnetic field; and when their mechanical equilibrium is disturbed, hydromagnetic oscillations can be generated.
Lemaire Joseph
Roth Marcel
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