Physics
Scientific paper
Jan 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998sao..repts....e&link_type=abstract
Technical Report, NASA/CR-1998-206830; NAS 1.26:206830
Physics
Solar Wind, Ion Charge, Electromagnetic Measurement, Brightness, Plasmas (Physics), Magnetohydrodynamic Flow, Coronas, Electron Density (Concentration), Electron Energy, Plasma Interactions, Ulysses Mission
Scientific paper
The ion compositions measured in situ in the solar wind are important since the ion fractions carry information on the plasma conditions in the inner corona. The conditions in the inner corona define the properties of the solar wind plasma flow. Thus, if the ion fraction measurements can be used to unravel some of the plasma parameters in the inner corona, they will provide a valuable contribution to solving the heating and acceleration problem of the solar wind. The ion charge states in the solar wind carry information on electron temperature, electron density and ion flow speed. They are also sensitive to the shape of the electron distribution function. Through carefully modeling the solar wind and calculating the ion fractions predicted for different solar wind conditions, constraints on the electron temperature and ion flow speeds can be placed if the electron density is measured using polarization brightness measurements.
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