Characteristic electron variations across simple high-speed solar wind streams

Details Characteristic electron variations across simple high-speed solar wind streams Characteristic electron variations across simple high-speed solar wind streams

Nov 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978jgr....83.5285f&link_type=abstract

Journal of Geophysical Research, vol. 83, Nov. 1, 1978, p. 5285-5295. Research supported by the U.S. Department of Energy and N

Physics

18

Electron Distribution, High Energy Interactions, Interplanetary Space, Solar Wind Velocity, Interplanetary Magnetic Fields, Particle Motion, Velocity Distribution

Scientific paper

The paper deals with electron variations across simple high-speed streams. Comprehensive scans of the shapes of electron distributions measured at the highest bulk speeds confirm the results of Rosenbauer et al. (1976, 1977) and show that the electron velocity distributions can be broken down into a low-energy or core component and a high-energy strongly beamed component. The low-energy component displays many characteristics expected from a fluid: the internal particle coupling necessary to maintain this state must result from both binary Coulomb collisions and wave-particle interactions. The high-energy or halo component displays many characteristics expected to develop in the absence of collisions beyond a certain base radius. These electrons appear to evolve under the primary influence of static interplanetary magnetic and electric fields and, therefore, develop very anisotropic velocity distributions.

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