Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.2693d&link_type=abstract
Journal of Geophysical Research, vol. 82, July 1, 1977, p. 2693-2704.
Astronomy and Astrophysics
Astronomy
26
Interplanetary Magnetic Fields, Magnetohydrodynamic Stability, Satellite Observation, Solar Wind, Spaceborne Astronomy, Explorer 33 Satellite, Explorer 35 Satellite, Magnetic Variations, Plasma Waves, Solar Wind Velocity, Variance (Statistics)
Scientific paper
Data from the Explorer 33 and 35 satellites were used to study Alfvenic fluctuations (i.e., fluctuations with a high correlation between perturbation in velocity and magnetic field) in the solar wind. It was found that the average minimum variance method does not give a good estimate of the phase front direction of these fluctuations. There is a distinct class of Alfvenic fluctuations with phase planes nearly parallel to the mean field B0. The characteristic length of the phase fronts of the fluctuations is probably significantly greater than 50 R-E. It is concluded that since tangential discontinuities and possibly other types of static structures appear in Alfvenic fluctuations, these fluctuations are not solely Alfven waves.
Burlaga Leonard Francis
Denskat K. U.
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