Microscale 'Alfven waves' in the solar wind at 1 AU

Details Microscale 'Alfven waves' in the solar wind at 1 AU Microscale 'Alfven waves' in the solar wind at 1 AU

Jan 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81...73b&link_type=abstract

Journal of Geophysical Research, vol. 81, Jan. 1, 1976, p. 73-77.

Physics

43

Explorer 43 Satellite, Interplanetary Magnetic Fields, Magnetohydrodynamic Waves, Polarization (Waves), Solar Wind, Circular Polarization, Elliptical Polarization, Interplanetary Medium, Magnetic Flux, Magnetic Variations, Propagation Modes

Scientific paper

Data obtained by IMP 1 about interplanetary plasma and magnetic-field fluctuations on a scale of one hour are analyzed. It is found that linearly and circularly polarized Alfven waves were rarely present. Fluctuations having most of the characteristics of large-amplitude 'Alfven waves' and which were observed to be moving away from the sun nearly along the magnetic-field direction are shown not to have been pure transverse Alfven waves since they were accompanied by nonzero fluctuations in the magnetic-field intensity. It is suggested that the fluctuations may have been nonlinear elliptically polarized Alfven waves coupled to the fast mode and moving through a magnetic field that is nonuniform on a scale not exceeding about 0.01 AU.

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