On the influence of the heliomagnetospheric periphery on the galactic cosmic rays

The suggestion is substantiated that the periphery of the heliomagnetosphere, the region in which properties depend on both solar wind and interstellar space parameters, plays a much more important role in the solar modulation of galactic cosmic rays than previously believed

The development of the maximum phase of solar cycle 23 in the galactic cosmic ray intensity

[1] The overall features of the solar cycle maximum phase in the galactic cosmic ray intensity near the Earth and the solar and heliospheric factors responsible for them are discussed. The development of the solar cycle in the galactic cosmic ray intensity near the Earth and in the outer heliosphere is compared, both for the absolute intensity and for that normalized allowing for the changing radial position of the spacecraft and the 22-year wave

The Gnevyshev Gap Effect in Galactic Cosmic Rays

Abstract During the last three solar cycles and in a wide energy range of galactic cosmic rays both the modulation and the variability of the intensity demonstrate effects related to the Gnevyshev Gap (GG) -a substantial decrease once or twice during the maximum phase of each solar cycle of a parameter that generally varies in phase with the cycle. The GG-effect also manifests itself in the behaviour of both the strength of the average interplanetary magnetic field and the power of its fluctuating component. The energy dependence of the GGeffect in the modulation and in the variability of the cosmic ray intensity was found to be different. The start of the GG-effect in the cosmic ray modulation practically coincides with a change in the energy dependence of the cosmic ray modulation

Global Processes that Determine Cosmic Ray Modulation

The global processes that determine cosmic ray modulation are reviewed. The essential elements of the theory which describes cosmic ray behavior in the heliosphere are summarized, and a series of discussions is presented which compare the expectations of this theory with observations of the spatial and temporal behavior of both galactic cosmic rays and the anomalous component; the behavior of cosmic ray electrons and ions; and the 26-day variations in cosmic rays as a function of heliographic latitude. The general conclusion is that the current theory is essentially correct. There is clear evidence, in solar minimum conditions, that the cosmic rays and the anomalous component behave as is expected from theory, with strong effects of gradient and curvature drifts. There is strong evidence of considerable latitude transport of the cosmic rays, at all energies, but the mechanism by which this occurs is unclear. Despite the apparent success of the theory, there is no single choice for the parameters which describe cosmic ray behavior, which can account for all of the observed temporal and spatial variations, spectra, and electron vs. ion behavior.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/43782/1/11214_2004_Article_164792.pd