Long-term variations of fluxes of solar protons and helium isotopes

被引：0
作者：
G. S. Anufriev
机构：
[1] Ioffe Physical-Technical Institute of the Russian Academy of Sciences,
来源：
Cosmic Research | 2012年 / 50卷
关键词：
Solar Wind; Solar Activity; Coronal Mass Ejection; Magnetic Cloud; Cosmic Research;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The fluxes of hydrogen and helium isotopes in the solar wind are reconstructed over a long time scale since the present time up to 600 million years back. Abundances of helium isotopes, obtained in the helium isotopic analysis made for 8 lunar soil samples, were used as initial data in the reconstruction procedure. Samples were taken off from various levels of the 1.6-m core of lunar soil delivered by the automatic Luna-24 station in 1976. The data on modern hydrogen and helium fluxes were used as well. The developed reconstruction procedure allowed one to select various solar wind components in a “gross” composition. Proton flux variations over the interval of 600 million years do not exceed a value of 40 %. Helium flux variations reach a value of 1.5–2 relative to the average value. Most likely, this circumstance is caused by considerable variations of a number of coronal mass ejections (CME) enriched by helium. The arguments in favor of solar activity polycyclicity on a long time scale are discussed.
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页码：405 / 409
页数：4
相关论文
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