34th Solar Physics Division Meeting, June 2003
Session 6 Solar Wind and Heliosphere
Poster, Monday, June 16, 2003, 3:30-5:00pm, Mezzanine

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[6.12] Electron Heating in the Solar Wind

J. M. Laming (Naval Research Laboratory)

Electron Heating in the Solar Wind

We discuss the possible role of lower hybrid waves in collisionless electron-ion equilibration, as a means of resolving the discrepancy between the higher charge states in minor ions measured in situ in the fast solar wind and those inferred remotely from spectroscopy of coronal hole regions, which are lower. Such equilibration occurs at a rate much faster than that due to Coulomb collisions alone, and occurs because of the anisotropy in the ion distribution function perpendicular to the magnetic field direction that arises in a density gradient with characteristic length as small as a few times the ion gyroradius.

Work supported by NASA Contract S13783G and by the NRL/ONR Solar Magnetism and the Earth's Environment 6.1 Research Option.

The author(s) of this abstract have provided an email address for comments about the abstract: jlaming@ssd5.nrl.navy.mil

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Bulletin of the American Astronomical Society, 35 #3
© 2003. The American Astronomical Soceity.