A Study of Electron Forbush Decreases with a 3D SDE Numerical Model

	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.
刊名	ASTROPHYSICAL JOURNAL
	2018
卷号	860 期号:2 页码:160
关键词	Cosmic Rays Sun: Activity Sun: Heliosphere
ISSN号	0004-637X
英文摘要	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.
语种	英语
资助机构	National Natural Science Foundation of China [41774185, U1738128, 41731067, 41531073] ; Specialized Research Fund for State Key Laboratories ; North-West University in South Africa ; South African National Research Foundation (NRF) [68198] ; NASA [NNX14AJ53G, NNX15AN72G] ; US National Science Foundation [CNS 09-23050]
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/6357]
专题	国家空间科学中心_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.
推荐引用方式 GB/T 7714	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.