Solar wind thermal electrons from 1.15 to 5.34 AU - ULYSSES observations

Details Solar wind thermal electrons from 1.15 to 5.34 AU - ULYSSES observations Solar wind thermal electrons from 1.15 to 5.34 AU - ULYSSES observations

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993adspr..13...47p&link_type=abstract

Advances in Space Research (ISSN 0273-1177), vol. 13, no. 6, p. 47-50.

Physics

12

Hot Electrons, Plasma Interaction Experiment, Solar Electrons, Solar Wind, Temperature Gradients, Ulysses Mission, Coulomb Collisions, Electron Distribution

Scientific paper

Using unique 3-d velocity space measurements by the Ulysses solar wind plasma experiment from 1.15 to 5.34 AU, we assess the radial gradient in thermal electron temperature. Until 3.8 AU, the gradient was steeper than previously reported but flatter than adiabatic; after 3.8 AU the gradient flattened. Trends in the observed electron distribution shapes qualitatively support predictions for regulation by Coulomb collisions and by expansion in a spiral IMF.

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