Evidence for the heating of thermal electrons at the magnetopause boundary layer |
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| Authors: | DJ Rodgers GL Wrenn SWH Cowley |
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| Institution: | Mullard Space Science Laboratory, Department of Physics and Astronomy, University College London, Holmbury St Mary, Dorking, Surrey, U.K.;Blackett Laboratory, Imperial College of Science and Technology, London SW7 2AZ, U.K. |
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| Abstract: | The suprathermal plasma analyser on the geostationary satellite Geos-2 can identify magnetospheric, boundary layer and magnetosheath electron distributions around the dayside equatorial magnetopause. As examples, data from two days when magnetopause crossings occurred, 28 August 1978 and 12 November 1978, are discussed. The boundary layer electrons are intermediate in temperature and density between those in the ring current and the magnetosheath but cannot be a simple admixture of the two populations. The transition from boundary layer to magnetosheath electrons is often sudden. We believe it to be coincident with the magnetopause where the magnetic field changes from terrestrial to interplanetary. |
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