Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..94..171d&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 94, no. 1, July 1983, p. 171-175.
Astronomy and Astrophysics
Astrophysics
1
Cosmic Rays, Intergalactic Media, Interstellar Magnetic Fields, Proton Energy, Energetic Particles, Magnetically Trapped Particles, Magnetohydrodynamics
Scientific paper
Drift instabilities arising when accelerated protons are trapped in the intergalactic medium are examined. If α, the ratio of total (plasma+energetic particles) pressure and magnetic field pressure is larger than some value αhbar ≅ 0.1 to 0.3, the magnetic trap is destroyed and protons are released into interstellar medium. If α < αhbar, the trapped protons exhibit gradient instability due to magnetic drift resonance. This "universal" instability results in rapid development of strong Alfvén wave turbulence with small wavelengths transverse to the magnetic field. Particle diffusion due to the waves has a rather complicated character and appears to be weak as compared to quasilinear diffusion.
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