Magnetic helicity of the IMF and the solar modulation of cosmic rays

Details Magnetic helicity of the IMF and the solar modulation of cosmic rays Magnetic helicity of the IMF and the solar modulation of cosmic rays

Aug 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987georl..14..864b&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 14, Aug. 1987, p. 864-867.

Physics

42

Cosmic Rays, Interplanetary Magnetic Fields, Magnetic Field Configurations, Radiant Flux Density, Solar Wind, Helium Ions, Jupiter Atmosphere, Modulation, Solar Activity Effects, Solar Magnetic Field

Scientific paper

Using interplanetary magnetic field data acquired at 1 AU, the authors show that the distribution of magnetic helicity in the heliosphere is asymmetric about the current sheet, in accord with recent theoretical predictions. Such an asymmetric distribution of helicity can in principle explain the sensitivity of the solar modulation of cosmic rays to the sun's magnetic polarity, as observed in charge sign dependent modulation, Jovian electrons, and anomalous 4He.

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