The effect of the heliospheric current sheet on cosmic ray intensities at solar maximum - Two alternative hypotheses

Details The effect of the heliospheric current sheet on cosmic ray intensities at solar maximum - Two alternative hypotheses The effect of the heliospheric current sheet on cosmic ray intensities at solar maximum - Two alternative hypotheses

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91.2889t&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 91, March 1, 1986, p. 2889-2895. NASA-supported research.

Physics

8

Current Sheets, Galactic Cosmic Rays, Heliosphere, Solar Cycles, Kinetic Energy, Modulation, Polarity

Scientific paper

The capabilities of two alternative models for accounting for the reversal of the solar magnetic field polarity at the point of solar maximum and for the associated modulation of cosmic ray intensities at 1 AU are assessed. One model posits a continuous increase in the inclination of the heliospheric current sheet to a point of verticality at maximum, when it overturns and the reversal occurs. The alternative view is that the sun sheds the magnetic field of the previous cycle and generates a new field of opposite polarity. Some data do exist for a tilted current sheet which increases its tilt with proximity to the solar maximum. However, coronal data also support the presence of isolated regions of anomalous polarity which spread over the surface of the sun as maximum approaches, a condition commensurate with flux shedding. Both models predict heliospheric current sheet configurations which would produce some cosmic ray modulations observed over the course of the solar cycle.

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