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A Study of Electron Forbush Decreases with a 3D SDE Numerical Model
Luo, Xi; Potgieter, Marius S.; Zhang, Ming; Feng, Xueshang; Luo, X (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, SIGMA Weather Grp, Beijing 100190, Peoples R China.; Luo, X (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
作者部门空间科学部
发表期刊ASTROPHYSICAL JOURNAL
2018
卷号860期号:2页码:160
ISSN0004-637X
语种英语
关键词Cosmic Rays Sun: Activity Sun: Heliosphere
摘要Because of the precise measurements of the cosmic ray electron flux by the PAMELA and AMS02, Electron Forbush decreases (Fds) have recently been observed for the first time. This serves as motivation to perform a numerical study of electron Forbush decreases with an advanced time-dependent, three-dimensional (3D) stochastic differential equation model, developed earlier to study proton Fds. The model includes a realistic interstellar electron spectrum reconstructed from Voyager observations, and diffusion and drift coefficients to reproduce the modulated spectrum observed by PAMELA in 2009. On the basis of this numerical model, electron Fd profiles for a range of rigidities are simulated. In addition, a systematic comparison between electron and proton Fds during different solar polarity epochs is performed. This approach gives insight into the rigidity dependence of the heliospheric diffusion coefficients and of drift effects over two magnetic field polarity cycles. We find that during an A > 0 epoch, the recovery time of a 1 GV proton Fd is remarkably shorter than the 1 GV electrons, whereas the electron Fd display a faster recovery during an A < 0 epoch. This model clear predicts a charge-sign dependent effect in the recovery time of Fds but less so for their magnitude.
收录类别SCI
文献类型期刊论文
条目标识符http://ir.nssc.ac.cn/handle/122/6357
专题空间科学部
通讯作者Luo, X (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, SIGMA Weather Grp, Beijing 100190, Peoples R China.; Luo, X (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
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Luo, Xi,Potgieter, Marius S.,Zhang, Ming,et al. A Study of Electron Forbush Decreases with a 3D SDE Numerical Model[J]. ASTROPHYSICAL JOURNAL,2018,860(2):160.
APA Luo, Xi,Potgieter, Marius S.,Zhang, Ming,Feng, Xueshang,Luo, X ,&Luo, X .(2018).A Study of Electron Forbush Decreases with a 3D SDE Numerical Model.ASTROPHYSICAL JOURNAL,860(2),160.
MLA Luo, Xi,et al."A Study of Electron Forbush Decreases with a 3D SDE Numerical Model".ASTROPHYSICAL JOURNAL 860.2(2018):160.
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