Asymmetry effects associated with the X-component of the IMF in a magnetically open magnetosphere

Details Asymmetry effects associated with the X-component of the IMF in a magnetically open magnetosphere Asymmetry effects associated with the X-component of the IMF in a magnetically open magnetosphere

Aug 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981p%26ss...29..809c&link_type=abstract

Planetary and Space Science, vol. 29, Aug. 1981, p. 809-818.

Computer Science

34

Earth Magnetosphere, Geomagnetism, Interplanetary Magnetic Fields, Magnetic Field Configurations, Solar Terrestrial Interactions, Solar Wind, Asymmetry, Auroras, Current Sheets, Magnetic Dipoles, Polar Caps, Solar Activity Effects

Scientific paper

The origin of magnetospheric asymmetry effects associated with the equatorial plane component of the interplanetary magnetic field (IMF) is examined in terms of the forces exerted on open flux tubes mapping into the solar wind. It is suggested that the downstream relaxation of the magnetosphere under the effect of these stresses towards a state of reduced stress is such as to allow partial penetration of this field component (both Bx and By in magnetospheric coordinates) into the magnetosphere. Many of the associated phenomena are therefore qualitatively described by the dipole-plus-uniform-IMF model, since this represents the idealization of exactly zero electromagnetic stress and hence gives a lowest-order picture of the effects which result from magnetospheric relaxation toward that state. This is true of By-associated effects which are well-documented experimentally. It is suggested that corresponding phenomena are expected to be associated with the Bx field as well.

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