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Modulation of Galactic Cosmic Rays in the Inner Heliosphere over Solar Cycles
Shen, Z. -N.; Qin, G.; Qin, G (reprint author), Harbin Inst Technol, Sch Sci, Shenzhen 518055, Peoples R China.
作者部门空间科学部
发表期刊ASTROPHYSICAL JOURNAL
2018
卷号854期号:2页码:137
ISSN0004-637X
语种英语
关键词Cosmic Rays Diffusion Sun: Activity Sun: Heliosphere Turbulence
摘要The 11- and 22-year modulation of galactic cosmic rays (GCRs) in the inner heliosphere is studied using a numerical model developed by Qin and Shen in 2017. Based on the numerical solutions of Parker's transport equations, the model incorporates a modified Parker heliospheric magnetic field, a locally static time-delayed heliosphere, and a time-dependent diffusion coefficients model in which an analytical expression of the variation of magnetic turbulence magnitude throughout the inner heliosphere is applied. Furthermore, during solar maximum, the solar magnetic polarity is determined randomly with the possibility of A > 0 decided by the percentage of the solar north polar magnetic field being outward and the solar south polar magnetic field being inward. The computed results are compared at various energies with several GCR observations, e.g., the Interplanetary Monitoring Platform 8 (IMP 8), EPHIN on board the Solar and Heliospheric Observatory (SOHO), Ulysses, and Voyager 1 and 2, and they show good agreement. We show that our model has successfully reproduced the 11- and 22-year modulation cycles.
收录类别SCI
文献类型期刊论文
条目标识符http://ir.nssc.ac.cn/handle/122/6201
专题空间科学部
通讯作者Qin, G (reprint author), Harbin Inst Technol, Sch Sci, Shenzhen 518055, Peoples R China.
推荐引用方式
GB/T 7714
Shen, Z. -N.,Qin, G.,Qin, G . Modulation of Galactic Cosmic Rays in the Inner Heliosphere over Solar Cycles[J]. ASTROPHYSICAL JOURNAL,2018,854(2):137.
APA Shen, Z. -N.,Qin, G.,&Qin, G .(2018).Modulation of Galactic Cosmic Rays in the Inner Heliosphere over Solar Cycles.ASTROPHYSICAL JOURNAL,854(2),137.
MLA Shen, Z. -N.,et al."Modulation of Galactic Cosmic Rays in the Inner Heliosphere over Solar Cycles".ASTROPHYSICAL JOURNAL 854.2(2018):137.
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