Core electron drift in the solar wind: measurements and instability thresholds

Details Core electron drift in the solar wind: measurements and instability thresholds Core electron drift in the solar wind: measurements and instability thresholds

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh53b2035b&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH53B-2035

Physics

Plasma Physics

[7829] Space Plasma Physics / Kinetic Waves And Instabilities

Scientific paper

We describe an analysis of solar wind electron measurements from the Wind/3DP experiment. We have fitted several hundred thousand electron distribution functions to a three component (core, halo, strahl) distribution function. Here we show statistically that the (Maxwellian) core drifts with respect to the solar wind protons and that this drift speed is a simple function of the collision rate, as expected. In the collisionless limit, the electron-proton drift is large (200 km/s) and may be limited by a core-proton or 'heat flux' instability and could be a source of Alfven or whistler waves.

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