Physics – Space Physics
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ncimc...6..145i&link_type=abstract
Nuovo Cimento C, Geophysics and Space Physics, vol. 6C, Mar.-Apr. 1983, p. 145-158. Research supported by the Consiglio Nazional
Physics
Space Physics
16
Anisotropy, Coronal Holes, Galactic Cosmic Rays, Solar Wind, Equatorial Atmosphere, Harmonics, Interplanetary Space, Solar Corona
Scientific paper
The cosmic-ray equatorial anisotropy inside broad high-speed solar-wind streams ejected by coronal holes, i.e. in quasi-stationary conditions, is analysed over the years 1973-1974. From the beginning to the end of the stream the amplitudes of the first and second harmonics of the anisotropy are found to decrease remarkably by factors 2.5 and 2.0, respectively, while the phases do not show systematic variations. The development of the stream structure in the interplanetary space together with the Parker theory on the diurnal anisotropy in stationary condition give a plausible explanation for the large variation observed in the first harmonic of the anisotropy. The behavior of the second harmonic is tentatively interpreted in the light of current theories.
Iucci N.
Parisi Mario
Storini Marisa
Villoresi G.
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