North-south anisotropy during the quasi-stationary modulation of galactic cosmic rays

Details North-south anisotropy during the quasi-stationary modulation of galactic cosmic rays North-south anisotropy during the quasi-stationary modulation of galactic cosmic rays

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991stin...9317647s&link_type=abstract

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Physics

Anisotropy, Galactic Cosmic Rays, Solar Terrestrial Interactions, Solar Wind, Traveling Wave Modulation, Coronal Holes, Earth Magnetosphere, Magnetic Disturbances, Solar Wind Velocity

Scientific paper

High speed solar wind streams coming from coronal holes produce, in the interplanetary space, a quasi stationary modulation of galactic cosmic rays. This modulation was analyzed taking into account the charged particle isotropic intensity and the north-south anisotropy, derived from ground based measurements. The obtained results for the period Oct. 1964 to Dec. 1987 are summarized. Data from Bartels solar rotation n. 2034 (23 May to 18 Jun. 1982) are used to illustrate the north-south anisotropy phenomenology. The data analysis lead to the conclusion that the average north-south anisotropy behavior observed is related to the corresponding temporal variations detected and/or inferred in the interplanetary magnetic field and the solar wind bulk speed parameters.

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