Cosmic Rays in the Heliosphere: Volume Resulting from an by L.A. Fisk, J.R. Jopikii, G.M. Simnett, Rudolf von Steiger,

By L.A. Fisk, J.R. Jopikii, G.M. Simnett, Rudolf von Steiger, K.-P. Wenzel

In each medical self-discipline there are milestones - sessions of vital accom­ plishment whilst it really is acceptable to pause and summarize the nation of the sector. Such is the case for the examine of the habit of cosmic rays within the heliosphere. we're simply passing via sunlight minimal stipulations, whilst the heliosphere has a well-ordered and comparatively basic configuration. we've got been lucky to have an array of spacecraft - remarkable within the heritage of house exploration and not going to be repeated for generations - to supply finished measurements of cosmic rays through the heliosphere. Ulysses has accomplished its historical first exploration of the heliosphere at excessive heliographic latitudes. Pioneer and Voyager were exploring the outer heliosphere. The sturdy IMP-8 and now the WIND spacecraft have supplied specified baseline measurements at Earth. simultaneously, there was a gradual development in theoretical realizing of cosmic ray habit by using ever extra subtle numerical versions. This milestone in cosmic ray reviews used to be celebrated with a Workshop on Cos­ mic Rays within the Heliosphere which was once convened by way of L. A. Fisk, J. R. Jokipii.

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Extra info for Cosmic Rays in the Heliosphere: Volume Resulting from an ISSI Workshop 17–20 September 1996 and 10–14 March 1997, Bern, Switzerland (Space Sciences Series of ISSI) (Volume 3)

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The values of G A, G T and the V-2 intensity for galactic (180-450 MeV/n). and anomalous (10-21 MeV/n) He (Figure 6) are shown as typical of the 1980-1990 qA < 0 period (Cummings and Stone. 1988; Cummings et al.. • 1992). In all cases G A rcaches its peak negative value at the time the intensity is at a maximum which also coincides with the minimum inclination of the current sheet in this region of the heliosphere. These maximum values of G A are of the 39 COSMIC-RAY MODULATION IN THE HELIOSPHERE 18 ......

1993). The existence of step decreases and plateau regions defines the principle dynamics of the long-term modulation in terms of a discontinuous, ratchetlike process that is turned on for an interval of time, but the effects of which persist over a much longer period. Burlaga et al. (1991; 1993a,b) and McDonald et al. (1993) have shown that these modulation events are associated with global-merged interaction regions (GMIRs). Originally identified by Burlaga et al. (1984; 1985; 1993a,b), GMIRs form and evolve with increasing heliocentric distance through the coalescence of interplanetary shocks and corotating interaction regions produced by coronal mass ejections and high-speed solar wind streams.

Lett. 14. 174. Evenson. , Meyer, P.. : 1983, 'A quantitative test of solar modulation theory: the proton, helium, and electron spectra from 1965 through 1979', Astrophys. J. 275. L 15. : 1974. 'An interpretation of the observed oxygen and nitrogen enhancements in low energy cosmic rays', Astrophys. J. 190, L35. , Haasbroek. : 1996, 'Latitude variations of ~ 7 MeV and> 300 MeV cosmic ray electron fluxes in the heliosphere: ULYSSES COSPIN/KET results and implications', Astron. Astrophys. 316. 528.

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