Variation of the average 'freezing-in' temperature of oxygen ions with solar wind speed

Details Variation of the average 'freezing-in' temperature of oxygen ions with solar wind speed Variation of the average 'freezing-in' temperature of oxygen ions with solar wind speed

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980georl...7..577o&link_type=abstract

Geophysical Research Letters, vol. 7, Aug. 1980, p. 577-580.

Physics

6

Gas Ionization, Ion Temperature, Oxygen Ions, Solar Temperature, Solar Wind Velocity, Solar Corona, Thermodynamic Equilibrium

Scientific paper

Observations of the average oxygen ionization equilibrium as a function of speed of the solar wind are presented. At low solar wind speeds they indicate a coronal temperature at the freezing-in point of (1.6 + or - 0.2) x 10 to the 6th K. At speeds above 450 km/sec the apparent temperature starts to rise rapidly. This rise is tentatively interpreted in terms of a lack of thermodynamic equilibrium in the source region.

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