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Detailed Reference Information |
Ostryakov, V.M., Kartavykh, Y.Y., Ruffolo, D., Kovaltsov, G.A. and Kocharov, L. (2000). Charge state distributions of iron in impulsive solar flares: Importance of stripping effects. Journal of Geophysical Research 105: doi: 10.1029/1999JA005083. issn: 0148-0227. |
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A model of stochastic acceleration of heavy ions by Alfv¿n wave turbulence has been developed. It takes into account spatial diffusion, Coulomb losses, and the possibility of charge changes for ions during stochastic acceleration. The main processes influencing the ionic charge states are the stripping by thermal electrons and protons as constituents of a surrounding medium and dielectronic and radiative recombination. We have calculated energy spectra and charge distributions of nonthermal Fe ions as a sample species. The dependence of the charge distributions and energy spectra of iron on the parameters of the plasma (temperature and number density) is studied. We compare our results with measurements to date of the mean charge of iron in impulsive solar flare events and conclude that they indicate source plasma ionization temperatures between 6□¿106 and 107 K. ¿ 2000 American Geophysical Union |
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Abstract |
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Keywords
Interplanetary Physics, Energetic particles, solar, Solar Physics, Astrophysics, and Astronomy, Flares, Space Plasma Physics, Ionization processes |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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