Variation of the average ‘freezing‐in’ temperature of oxygen ions with solar wind speed | Zendy

Ogilvie Keith W. | Zendy; Vogt C. | Zendy

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Variation of the average ‘freezing‐in’ temperature of oxygen ions with solar wind speed

Author(s) -

Ogilvie Keith W.,

Vogt C.

Publication year - 1980

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/gl007i008p00577

Subject(s) - atmospheric sciences , wind speed , oxygen , solar wind , ion , environmental science , variation (astronomy) , physics , thermodynamic equilibrium , ionization , thermodynamics , meteorology , plasma , astrophysics , quantum mechanics

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 ± 0.2 × 10 6 °K. At speeds above 450 km sec −1 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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