Large-scale structure of solar wind as observed on the Prognoz 7 satellite

Physics

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Particle Emission, Solar Wind, Interplanetary Magnetic Fields

Scientific paper

Properties of different solar wind streams depend on the large scale structure of coronal magnetic field and dynamical phenomena in the solar atmosphere. We present average values and distributions of MHD parameters (density, velocity, temperature, fluxes of mass, momentum and energy, ratio of thermal and magnetic pressures, as well as helium abundance) as observed on board the Prognoz 7 satellite in different types of solar wind streams connected with well-known solar corona structures and phenomena: (1) heliospheric current sheet, (2) streams from coronal holes, (3) streams from coronal streamers, (4) plasma disturbed by interplanetary shocks, and (5) coronal mass ejections. For quasistationary streams of solar wind, maximum mass flux is recorded in streams emanating from coronal streamers while maximum thermal and kinetic energy fluxes are observed in streams from coronal holes. The momentum fluxes are equal in both types of streams. Maximum ratio of thermal and magnetic pressures is observed in the heliospheric current sheet.

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