Evidence for the regulation of solar wind heat flux at 1 AU

Details Evidence for the regulation of solar wind heat flux at 1 AU Evidence for the regulation of solar wind heat flux at 1 AU

Oct 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.5207f&link_type=abstract

Journal of Geophysical Research, vol. 81, Oct. 1, 1976, p. 5207-5211. ERDA-NASA-supported research.

Physics

9

Electron Flux Density, Heat Flux, Interplanetary Medium, Magnetohydrodynamic Waves, Solar Flux, Solar Wind Velocity, Data Reduction, Explorer 43 Satellite, Statistical Analysis, Statistical Correlation, Time Series Analysis

Scientific paper

Observational evidence favoring the local regulation of solar-wind heat flux at 1 AU is reviewed, and four months of IMP 6 plasma and magnetic-field data are merged and analyzed in order to investigate what might be regulating the heat flux. A statistical analysis of the data shows that the solar-wind Alfven speed is probably regulating the heat flux locally at 1 AU and that the Alfven speed, the velocity difference between the peak of low-energy electrons and the bulk plasma velocity, and the solar-wind velocity component projected along the local spiral angle are statistically well correlated for Alfven speeds not exceeding about 70 km/s. A time-series analysis of the data indicates that only the Alfven speed and the velocity difference between the peak of low-energy electrons and the bulk plasma velocity are well correlated both qualitatively and quantitatively on a microscopic time scale. It is strongly suggested that, at times, the solar-wind heat flux is locally regulated by the magnitude of the Alfven speed at 1 AU. Uncertainties in the results are discussed.

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