中国科学院国家空间科学中心机构知识库
Advanced  
NSSC OpenIR  > 空间科学部  > 期刊论文
题名: A Numerical Study of Forbush Decreases with a 3D Cosmic-Ray Modulation Model Based on an SDE Approach
作者: Luo, Xi; Potgieter, Marius S.; Zhang, Ming; Feng, Xueshang
作者部门: 空间科学部
通讯作者: Luo, X (reprint author), Chinese Acad Sci, SIGMA Weather Grp, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China. ; Luo, X (reprint author), North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
关键词: cosmic rays ; Sun: activity ; Sun: heliosphere
刊名: ASTROPHYSICAL JOURNAL
ISSN号: 0004-637X
出版日期: 2017
卷号: 839, 期号:1, 页码:53
收录类别: SCI
项目资助者: National Natural Science Foundation of China [41231068, 41304137, 41531073, 41504132, 11575203] ; Specialized Research Fund for State Key Laboratories ; post-doctoral programme of the North-West University in South Africa ; South African National Research Foundation (NRF) [87820, 68198] ; NASA [NNX14AJ53G, NNX15AN72G] ; US National Science Foundation [CNS 09-23050]
英文摘要: Based on the reduced diffusion mechanism for producing Forbush decreases (Fds) in the heliosphere, we constructed a three-dimensional (3D) diffusion barrier,. and by incorporating it into a stochastic differential equation (SDE) based time-dependent, cosmic-ray transport model, a 3D numerical model for simulating Fds is built and applied to a period of relatively quiet solar activity. This SDE model generally corroborates previous Fd simulations concerning the effects of the solar magnetic polarity, the tilt angle of the heliospheric current sheet (HCS), and cosmic-ray particle energy. Because the modulation processes in this 3D model are multi-directional, the barrier's geometrical features affect the intensity profiles of Fds differently. We find that both the latitudinal and longitudinal extent of the barrier have relatively fewer. effects on these profiles than its radial extent and the level of decreased diffusion inside the disturbance. We find,. with the 3D approach, that the HCS rotational motion causes the relative location from the observation point to the HCS to vary, so that a. periodic pattern appears in the cosmic-ray intensity at the observing location. Correspondingly, the magnitude and recovery time of an Fd change, and. the recovering intensity profile contains oscillation as well. Investigating the Fd magnitude variation with heliocentric radial distance, we find that the magnitude decreases. overall. and,. additionally, that the Fd magnitude exhibits an oscillating pattern as the radial distance increases, which coincides well with the wavy profile of the HCS under quiet solar modulation conditions.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/5839
Appears in Collections:空间科学部_期刊论文

Files in This Item:
File Name/ File Size Content Type Version Access License
2017839153.pdf(711KB)期刊论文作者接受稿限制开放View 联系获取全文
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Luo, Xi]'s Articles
[Potgieter, Marius S.]'s Articles
[Zhang, Ming]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Luo, Xi]‘s Articles
[Potgieter, Marius S.]‘s Articles
[Zhang, Ming]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
文件名: 2017839153.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2017  中国科学院国家空间科学中心 - Feedback
Powered by CSpace