Solar modulation of cosmic electrons - Evidence for dynamic regulation

Details Solar modulation of cosmic electrons - Evidence for dynamic regulation Solar modulation of cosmic electrons - Evidence for dynamic regulation

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...373l..27t&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 373, May 20, 1991, p. L27-L30.

Astronomy and Astrophysics

Astronomy

18

Cosmic Rays, Electron Distribution, Solar Activity Effects, Solar Wind, Abundance, Modulation, Spaceborne Astronomy, Stellar Winds

Scientific paper

An analysis of data on cosmic-ray electrons in the energy range 1-10 GeV returned by the University of Chicago instrument on the ISEE 3/ICE spacecraft during the time interval 1978-1989 has been completed. When combined with other results, these new data indicate that the solar modulation of these electrons is remarkably different from that of nuclei of similar rigidity. Most notably, the electrons reach a much higher flux level in 1987 than in 1977 in distinction to nuclei which typically attain similar flux levels at successive solar minima. No clear understanding of this behavior emerges from current models of the charge sign dependence of solar modulation. It is suggested that this apparent lack of symmetry may indicate a dynamical role of cosmic rays in the modulation process.

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