Solar wind modulation of galactic cosmic rays

Details Solar wind modulation of galactic cosmic rays Solar wind modulation of galactic cosmic rays

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30c..33a&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 3, pp. 33-1, CiteID 1133, DOI 10.1029/2002GL016017

Astronomy and Astrophysics

Astrophysics

8

Interplanetary Physics: Solar Wind Plasma, Interplanetary Physics: Cosmic Rays, Interplanetary Physics: Energetic Particles, Heliospheric (7514), Solar Physics, Astrophysics, And Astronomy: Energetic Particles (2114), Interplanetary Physics: Solar Cycle Variations (7536)

Scientific paper

We have analyzed the annual mean hourly data for the solar wind speed (V), the interplanetary magnetic field (IMF) intensity (B), and the neutron monitor (NM) rates for 1964-1998, covering three sunspot number (SSN) cycles (20, 21, 22). The analysis brings out some of the steady state characteristics of the long-term changes in the observed galactic cosmic ray (GCR) modulation and the `mini' cycle. We find that BV time series reproduces the observed variations of a variety of phenomena, including the 11-yr and the 27-day GCR modulations. We reaffirm that convective removal of GCR by the solar wind accounts for a major part of the observed modulations in the inner heliosphere.

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