Physics
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.2043h&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 17, Oct. 1990, p. 2043-2046.
Physics
26
Boundary Layer Plasmas, Electron Density (Concentration), Electron Energy, Magnetosheath, Artificial Satellites, Data Processing, Earth Magnetosphere, Magnetic Fields, Solar Wind
Scientific paper
A complete survey of all electron data recorded during low-latitude boundary layer crossings of the AMPTE-UKS spacecraft is presented. In 27 of the 31 cases, there is a clear anticorrelation between the density and the mean energy of the electrons during the transition across the boundary layer. The simplest interpretation of this anticorrelation is that, in the majority of cases, there is a smooth change of plasma state between the bounding solar and terrestrial plasmas, and that the abrupt changes frequently seen in time series data arise from boundary layer motions. These data indicate that there are always two distinct sections to the anticorrelation, these may represent two physically distinct regions within the boundary layer, and indicate how electron density and energy might vary across them. An alternative interpretation in which filaments of magnetosheath plasma penetrate the boundary layer is discussed; these results provide a constraint on such a model.
Bryant Duncan A.
Hapgood M. A.
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