Large-scale solar wind fluctuations in the inner heliosphere at low solar activity

Details Large-scale solar wind fluctuations in the inner heliosphere at low solar activity Large-scale solar wind fluctuations in the inner heliosphere at low solar activity

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94..168b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Jan. 1, 1989, p. 168-176. Research supported by CNR.

Physics

27

Heliosphere, Magnetohydrodynamic Stability, Plasma Dynamics, Solar Wind, Amplitude Distribution Analysis, Correlation Coefficients, Magnetohydrodynamic Waves, Radiation Pressure

Scientific paper

The properties of solar wind fluctuations with time scales from 1 h to 3 days in the inner heliosphere (0.3 to 1.0 AU) close to the minimum of solar cycle 21 are studied. Hourly averages of plasma and magnetic field data from Helios spacecraft have been used. It is found that the features of the fluctuatuons depend dramatically upon the time scale. At scales from 1 to 12 hours, Alfvenic correlation is dominant. At scales from 0.5 to 3 days the amount of Alfvenic fluctuations is greatly reduced.

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