Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...139..467m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 139, no. 2, Oct. 1984, p. 467-473.
Astronomy and Astrophysics
Astrophysics
13
Coronal Loops, Energetic Particles, Magnetohydrodynamic Waves, Solar Protons, Wave Dispersion, Inhomogeneity, Isotropic Media, Particle Acceleration, Plasma Density, Wave Equations
Scientific paper
It is shown that the Alfvén wave dispersion associated with the gyrotropy ω/ωi very low 1, leads to waveguiding of Alfvén waves in plasma density inhomogeneities (ducts) of coronal magnetic loops. In flaring loops isotropization of the accelerated protons by Alfvén waves forces them to escape rapidly into the loss-cone and to precipitate in the solar chromosphere. This explains the deficit of energetic protons in interplanetary space observable in some flares as compared to their number, expected from the gamma-ray emission. In sources of pulsating Type IV radio emission, where ξ ⪆ 1, the pitch-angle diffusion of protons due to Alfvén waves determines the pulse train duration.
Mazur Vitalii A.
Stepanov Alexander V.
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