Physics
Scientific paper
Oct 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.5043c&link_type=abstract
Journal of Geophysical Research, vol. 81, Oct. 1, 1976, p. 5043-5048.
Physics
Interplanetary Magnetic Fields, Magnetic Effects, Solar Magnetic Field, Solar Wind, Time Dependence, Elliptical Polarization, Fourier Series, Magnetic Dipoles, Magnetic Field Configurations, Solar Rotation
Scientific paper
Effects of the time dependence of the sun's magnetic field on the interplanetary field in the solar wind are considered. General expressions for the interplanetary field are developed under the assumptions that the radial component of the sun's field at some reference surface can be described in terms of spherical harmonics with coefficients which are functions of time represented by Fourier series and that the solar wind expands radially in a steady-state flow. Some of the simplest field configurations are examined in additional detail. It is shown that the variation in the sun's field may produce elliptically polarized fluctuations in the interplanetary field, may generate field strengths in the north-south direction that are comparable in magnitude to the spiral field, may produce north-south fields with nonzero averages over significant periods of time, and may produce systematic deviations from the nominal steady-state spiral angle over such periods.
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