Solar wind plasma electron parameters based on aligned observations by ICE and ULYSSES

Details Solar wind plasma electron parameters based on aligned observations by ICE and ULYSSES Solar wind plasma electron parameters based on aligned observations by ICE and ULYSSES

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995adspr..16r..95p&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 16, no. 9, p. (9)95-(9)100

Mathematics

Probability

16

Electron Plasma, International Sun Earth Explorer 3, Solar Wind, Solar Wind Velocity, Ulysses Mission, Electron Distribution, Electron Energy, Probability Density Functions, Temperature Gradients

Scientific paper

During November-December 1991, the International Cometary Explorer (ICE) and Ulysses spacecraft were aligned in solar longitude, with an angular offset as small as 1 deg and a radial offset of 3.8 to 4.0 AU. Both spacecraft carry spectrometers which measure the thermal and suprathermal solar wind electron distributions. During the alignment interval, both spacecraft encountered the declining phase of a high-speed solar wind stream, representing unshocked plasma. We use the aligned observations from ICE and Ulysses to characterized the radial gradients in core and halo electron temperature, relative halo density, and heat flux, as well as the core and total polytropic indices. The thermal properties of the core vary widely in a range from isothermal to adiabatic, while the halo is more nearly isothermal. The halo density falls off more steeply for higher density plasma, and the electron heat flux gradient indicates constant or decreasing distribution skewness.

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