The enhancement of solar wind fluctuations at the proton thermal gyroradius

Details The enhancement of solar wind fluctuations at the proton thermal gyroradius The enhancement of solar wind fluctuations at the proton thermal gyroradius

Mar 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80..998n&link_type=abstract

Journal of Geophysical Research, vol. 80, Mar. 1, 1975, p. 998-1002.

Physics

22

Plasma Oscillations, Power Spectra, Proton Energy, Satellite Observation, Solar Wind, Electron Density Profiles, Fluctuation Theory, Ion Distribution, Nonuniform Plasmas, Ogo-5, Scintillation, Statistical Analysis, Thermal Plasmas

Scientific paper

Average power spectra of solar wind fluctuations at frequencies up to 0.87 Hz are calculated from Ogo 5 measurements of positive ion flux. Although the general spectral trend follows the power law spectrum observed at lower frequencies, a small but statistically significant power enhancement is observed at the frequency v/2(pi)R, where v is the solar wind velocity and R is the gyroradius of proton thermal motions in the solar wind. The measured power spectrum is in rough agreement with that deduced from radio scintillation observations.

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