Fluctuations of energetic particle flux during solar cycle based on measurements in the solar wind, in the magnetosphere, and at Earth

被引：0
|
作者：
S. A. Starodubtsev
I. G. Usoskin
机构：
[1] Russian Academy of Sciences,Shafer Institute of Cosmophysical Research and Aeronomy
[2] Siberian Branch,Sodankylä Geophysical Observatory (Oulu unit), 90014
[3] University of Oulu,Ioffe Physicotechnical Institute
[4] Russian Academy of Sciences,undefined
来源：
Astronomy Letters | 2010年 / 36卷
关键词：
comic rays; solar cycle; solar wind; magnetosphere; geostationary orbit;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We present the results of our studies of the cosmic-ray fluctuations in the frequency range 10−4−1.67 × 10−3 Hz based on energetic particle flux measurements on spacecraft in the solar wind, in the magnetosphere, and at Earth in the 11-year solar cycle. The cosmic-ray fluctuation spectrum is shown to have an 11-year modulation related to the solar cycle. A different behavior of the level of energetic particle fluctuations measured in different regions of space is observed for cosmic rays of different origins. We conclude that the new, previously unknown phenomenon of 11-year modulation of the cosmic-ray fluctuation spectrum has been established. A possible explanation of this phenomenon is given.
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页码：438 / 443
页数：5
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