Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...242l...5s&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 242, no. 1, Feb. 1991, p. L5-L8. DFG-supported research.
Astronomy and Astrophysics
Astrophysics
28
Cosmic Rays, Magnetohydrodynamic Waves, Solar Cosmic Rays, Solar Flares, Interplanetary Medium, Power Spectra, Transport Properties, Turbulence Effects
Scientific paper
It is demonstrated that quasi-linear theory resolves the discrepancy between phenomenological and calculated values within the slab model of interplanetary turbulence if the magnetostatic approximation is discarded and the dissipation range of the turbulence is taken into account. The theory accounts for both the absolute value and the variation with particle energy of the scattering length, and requires values for the dissipation scale and the solar wind thermal density which agree excellently with the measured values. It is shown that at nonrelativistic energies the scattering length is determined solely by parameters of the interplanetary medium and not individual flare characteristics, explaining why different flares have led to the same Palmer consensus value of about 0.2 AU. Thus, the discrepancy appears to have been solved within quasi-linear theory.
Dung Rudiger
Jaekel Uwe
Schlickeiser Reinhard
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