PMO OpenIR  > 太阳高能及相关物理过程研究团组
ONSET OF ELECTRON ACCELERATION IN A FLARE LOOP
Sharykin, Ivan1,2; Liu, Siming1; Fletcher, Lyndsay3
2014-09-20
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume793Issue:1Pages:0
AbstractWe carried out a detailed analysis of X-ray and radio observations of a simple flare loop that occurred on 2002 August 12, with the impulsive hard X-ray (HXR) light curves dominated by a single pulse. The emission spectra of the early impulsive phase are consistent with an isothermal model in the coronal loop with a temperature reaching several keV. A power-law high-energy spectral tail is evident near the HXR peak time, in accordance with the appearance of footpoints at high energies, and is well correlated with the radio emission. The energy content of the thermal component keeps increasing gradually after the disappearance of this nonthermal component. These results suggest that electron acceleration only covers the central period of a longer and more gradual energy dissipation process and that the electron transport within the loop plays a crucial role in the formation of the inferred power-law electron distribution. The spectral index of power-law photons shows a very gradual evolution, indicating that the electron accelerator is in a quasi-steady state, which is confirmed by radio observations. These results are consistent with the theory of stochastic electron acceleration from a thermal background. Advanced modeling with coupled electron acceleration and spatial transport processes is needed to explain these observations more quantitatively, which may reveal the dependence of the electron acceleration on the spatial structure of the acceleration region.
KeywordAcceleration Of Particles Plasmas Sun: Flares Sun: Radio Radiation Sun: X-Rays, Gamma Rays Turbulence
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/793/1/25
WOS KeywordHARD X-RAY ; ENERGY-RELEASE EVENTS ; SOLAR-FLARES ; STOCHASTIC ACCELERATION ; PARTICLE-ACCELERATION ; CHROMOSPHERIC EVAPORATION ; IMPULSIVE PHASE ; CORONAL LOOPS ; TRANSPORT ; EMISSION
URL查看原文
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000341301700025
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10624
Collection太阳高能及相关物理过程研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
2.Russian Acad Sci, Space Res Inst IKI, Moscow 117997, Russia
3.Univ Glasgow, Sch Phys & Astron, SUPA, Glasgow G12 8QQ, Lanark, Scotland
Recommended Citation
GB/T 7714
Sharykin, Ivan,Liu, Siming,Fletcher, Lyndsay. ONSET OF ELECTRON ACCELERATION IN A FLARE LOOP[J]. ASTROPHYSICAL JOURNAL,2014,793(1):0.
APA Sharykin, Ivan,Liu, Siming,&Fletcher, Lyndsay.(2014).ONSET OF ELECTRON ACCELERATION IN A FLARE LOOP.ASTROPHYSICAL JOURNAL,793(1),0.
MLA Sharykin, Ivan,et al."ONSET OF ELECTRON ACCELERATION IN A FLARE LOOP".ASTROPHYSICAL JOURNAL 793.1(2014):0.
Files in This Item:
File Name/Size DocType Version Access License
2014015ONSET OF ELEC(1767KB) 开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Sharykin, Ivan]'s Articles
[Liu, Siming]'s Articles
[Fletcher, Lyndsay]'s Articles
Baidu academic
Similar articles in Baidu academic
[Sharykin, Ivan]'s Articles
[Liu, Siming]'s Articles
[Fletcher, Lyndsay]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Sharykin, Ivan]'s Articles
[Liu, Siming]'s Articles
[Fletcher, Lyndsay]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2014015ONSET OF ELECTRON ACCELERATION IN A FLARE LOOP.pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.
 

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