Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002acasn..43...48w&link_type=abstract
Acta Astronomica Sinica, vol.43, no.1, p.48-53
Astronomy and Astrophysics
Astronomy
2
3He-Rich Events, Turbulent Acceleration, Energetic Particle Spectrum
Scientific paper
According to the observational similar spectra forms of the energetic 3He and heavier ions in the 3He-rich events, we have solved Fokker-Planck equation numerically to study the evolution properties of 3He and heavier ions accelerated by Alfven turbulence with time. It's shown that the distribution of the energetic particles is mainly decided by the plasma density and the energy density of Alfven turbulence. If the plasma density, the magnetic field intensity and the energy density of Alfven turbulence are respectively taken (0.1-1)1010 cm-3, 50-100Gs and 0.4-2ergs cm-3 in the acceleration region, the energy of the accelerated 3He and heavier ions is the order of 10MeV/nucleon and the spectrum index is about 2-3.5 after 1s. All of these are basically consistent with the observations.
Tang Y.-H.
Wang Ding Yi
Wu Gui-Ping
Xu Aiguo
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