中国科学G辑(英文版)
中國科學G輯(英文版)
중국과학G집(영문판)
SCIENCE IN CHINA (PHYSICS ASTRONOMY)
2003年
1期
78-83
,共6页
敖先志%沈迹%涂传诒
敖先誌%瀋跡%塗傳詒
오선지%침적%도전이
solar wind%cyclotron resonance%quasi-linear theory%diffusion plateau
Although it has been long that spacecraft observed the anisotropy of velocity protons in the solar wind, there is still not a reasonable explanation. In this paper we try to give an explanation from the diffusion plateau of protoncyclotron resonance predicted by the quasi-linear theory for the resonance between the protons and the parallel propagating waves. We consider the effect of dispersion relation on diffusion plateau and notice that the diffusion plateau we have got by using cold plasma dispersion relation accords with the density contours in the velocity phase space detected at 0.3 AU in fast solar wind. For explaining proton distributions obtained in the fast solar wind from 0.7 AU to 1 AU hot plasma dispersion relation should be considered. We also give a theoretical relation of proton thermal anisotropy A and plasma parameter β.
