中国科学院紫金山天文台机构知识库
Advanced  
PMO OpenIR  > 太阳高能及相关物理过程研究团组  > 期刊论文
题名: Solar flares with similar soft but different hard X-ray emissions: case and statistical studies
作者: Sharykin, Ivan N.1; Struminsky, Alexei B.1; Zimovets, Ivan V.1; Gan WeiQun(甘伟群)2
刊名: RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期: 2016
卷号: 16, 期号:1
关键词: Sun: flares ; Sun: X-rays ; gamma rays
DOI: 10.1088/1674-4527/16/1/005
文章类型: Article
英文摘要: From the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) catalog we select events which have approximately the same GOES class (high C - low M or 500-1200 counts s(-1) within the RHESSI 6-12 keV energy band), but with different maximal energies of detected hard X-rays. The selected events are subdivided into two groups: (1) flares with X-ray emissions observed by RHESSI up to only 50 keV and (2) flares with hard X-ray emission observed also above 50 keV. The main task is to understand observational peculiarities of these two flare groups. We use RHESSI X-ray data to obtain spectral and spatial information in order to find differences between selected groups. Spectra and images are analyzed in detail for six events (case study). For a larger number of samples (85 and 28 flares in the low-energy and high-energy groups respectively) we only make some generalizations. In spectral analysis we use the thick-target model for hard X-ray emission and one temperature assumption for thermal soft X-ray emission. RHESSI X-ray images are used for determination of flare region sizes. Although thermal and spatial properties of these two groups of flares are not easily distinguishable, power law indices of hard X-rays show significant differences. Events from the high-energy group generally have a harder spectrum. Therefore, the efficiency of chromospheric evaporation is not sensitive to the hardness of nonthermal electron spectra but rather depends on the total energy flux of nonthermal electrons.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: LOW-ENERGY CUTOFFS ; SPECTROSCOPIC-IMAGER ; ELECTRON-SPECTRA ; RHESSI ; EVENTS ; TEMPERATURES
收录类别: SCI
项目资助者: RFBR(13-02-91165 ; MOST (973 program)(2011CB811402) ; National Natural Science Foundation of China(11233008 ; 15-32-21078) ; 11427803)
语种: 英语
WOS记录号: WOS:000368088700005
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16114
Appears in Collections:太阳高能及相关物理过程研究团组_期刊论文

Files in This Item:
File Name/ File Size Content Type Version Access License
2016033.pdf(553KB)----限制开放View 联系获取全文

作者单位: 1.Russian Acad Sci, Space Res Inst, Moscow 117997, Russia
2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Sharykin, Ivan N.]'s Articles
[Struminsky, Alexei B.]'s Articles
[Zimovets, Ivan V.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Sharykin, Ivan N.]‘s Articles
[Struminsky, Alexei B.]‘s Articles
[Zimovets, Ivan V.]‘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: 2016033.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 © 2007-2018  中国科学院紫金山天文台 - Feedback
Powered by CSpace