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: KINETIC SIMULATION OF SLOW MAGNETOSONIC WAVES AND QUASI-PERIODIC UPFLOWS IN THE SOLAR CORONA
作者: Ruan, Wenzhi; He, Jiansen; Zhang, Lei; Vocks, Christian; Marsch, Eckart; Tu, Chuanyi; Peter, Hardi; Wang, Linghua
作者部门: 空间科学部
通讯作者: He, JS (reprint author), Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China. ; He, JS (reprint author), Chinese Acad Sci, State Key Lab Space Weather, Beijing 100190, Peoples R China.
关键词: Sun: corona ; Sun: oscillations ; waves
刊名: ASTROPHYSICAL JOURNAL
ISSN号: 0004-637X
出版日期: 2016
卷号: 825, 期号:1, 页码:58
收录类别: SCI
项目资助者: NSFC [41574168, 41231069, 41274172, 41474148, 41421003, 41574166]
英文摘要: Quasi-periodic disturbances of emission-line parameters are frequently observed in the corona. These disturbances propagate upward along the magnetic field with speeds of similar to 100 km s(-1). This phenomenon has been interpreted as evidence of the propagation of slow magnetosonic waves or has been argued to be a signature of intermittent outflows superposed on the background plasmas. Here we aim to present a new "wave + flow" model to interpret these observations. In our scenario, the oscillatory motion is a slow-mode wave, and the flow is associated with a beam created by the wave-particle interaction owing to Landau resonance. With the help of a kinetic model, we simulate the propagation of slow-mode waves and the generation of beam flows. We find that weak periodic beam flows can be generated by to Landau resonance in the solar corona, and the phase with the strongest blueward asymmetry is ahead of that with the strongest blueshift by about 1/4 period. We also find that the slow wave damps to the level of 1/e after the transit time of two wave periods, owing to Landau damping and Coulomb collisions in our simulation. This damping timescale is similar to that resulting from thermal conduction in the MHD regime. The beam flow is weakened/attenuated with increasing wave period and decreasing wave amplitude since Coulomb collisions become more and more dominant over the wave action. We suggest that this "wave + flow" kinetic model provides an alternative explanation for the observed quasi-periodic propagating perturbations in various parameters in the solar corona.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.nssc.ac.cn/handle/122/5674
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
2016825158.pdf(1234KB)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
[Ruan, Wenzhi]'s Articles
[He, Jiansen]'s Articles
[Zhang, Lei]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Ruan, Wenzhi]‘s Articles
[He, Jiansen]‘s Articles
[Zhang, Lei]‘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: 2016825158.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