YNAO OpenIR  > 射电天文研究组
QUASI-PERIODIC ACCELERATION OF ELECTRONS IN THE FLARE ON 2012 JULY 19
Huang, Jing1,2; Kontar, Eduard P.3; Nakariakov, Valery M.4; Gao GN(高冠男)5
Source PublicationASTROPHYSICAL JOURNAL
2016-11-20
Volume831Issue:2
DOI10.3847/0004-637X/831/2/119
Contribution Rank第5完成单位
Indexed BySCI
KeywordSun: Oscillations Sun: Radio Radiation Sun: Uv Radiation
Abstract

Quasi-periodic pulsations (QPPs) of nonthermal emission in an M7.7 class flare on 2012 July 19 are investigated with spatially resolved observations at microwave and. HXR bands and with spectral observations at decimetric, metric waves. Microwave emission at 17 GHz of two footpoints, HXR emission at 20-50 keV of the. north footpoint and loop top, and type III bursts at 0.7-3 GHz show prominent in-phase oscillations at 270 s. The microwave emission of the. loop leg has less pulsation. but stronger emission. Through the. estimation of plasma density around the loop top from EUV observations, we find that the local plasma frequency would be 1.5 GHz or even higher. Thus, type III bursts at 700 MHz originate above the loop top. Quasi-periodic acceleration or injection of energetic electrons is proposed to dominate these. in-phase QPPs of nonthermal emission from footpoints, loop top, and above. In the. overlying region, drifting pulsations (DPS) at 200-600 MHz oscillate at a distinct period (200 s). Its global structure drifts toward lower frequency, which is closely related to upward plasmoids observed simultaneously from EUV emission. Hence, nonthermal emission from overlying plasmoids and underlying flaring loops show. different oscillating periods. Two individual systems of quasi-periodic acceleration of electrons are proposed to coincide in the bi-direction outflows from the. reconnection region.

Funding ProjectNSFC[11573039] ; NSFC[11273030] ; NSFC[11221063] ; NSFC[11103044] ; NSFC[11373039] ; National Major Scientific Equipment RD Project[ZDYZ2009-3] ; Specialized Research Fund for State Key Laboratories[15010009 [2015-25F-04] ; GA CR[P209/12/0103] ; Marie Curie project[PIRSES-GA-295272-RADIOSUN]
Funding OrganizationNSFC[11573039, 11273030, 11221063, 11103044, 11373039] ; National Major Scientific Equipment RD Project[ZDYZ2009-3] ; Specialized Research Fund for State Key Laboratories[15010009 [2015-25F-04] ; GA CR[P209/12/0103] ; Marie Curie project[PIRSES-GA-295272-RADIOSUN]
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000387792500005
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordX-RAY OBSERVATIONS ; SOLAR-FLARE ; MAGNETIC RECONNECTION ; FINE-STRUCTURES ; RADIO-EMISSION ; PULSATIONS ; BURSTS ; LOOPS ; EVENT ; TRAP
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9774
Collection射电天文研究组
Corresponding AuthorHuang, Jing
Affiliation1.Key Laboratory of Solar Activities, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, China
2.Sate Key Laboratory of Space Weather, Chinese Academy of Sciences, Beijing, 100190, China
3.School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, UK
4.Physics Department, University of Warwick, Coventry CV4 7AL, UK
5.Yunnan Observatory, Chinese Academy of Sciences, Kunming, Yunnan 650011, China
Recommended Citation
GB/T 7714
Huang, Jing,Kontar, Eduard P.,Nakariakov, Valery M.,et al. QUASI-PERIODIC ACCELERATION OF ELECTRONS IN THE FLARE ON 2012 JULY 19[J]. ASTROPHYSICAL JOURNAL,2016,831(2).
APA Huang, Jing,Kontar, Eduard P.,Nakariakov, Valery M.,&Gao GN.(2016).QUASI-PERIODIC ACCELERATION OF ELECTRONS IN THE FLARE ON 2012 JULY 19.ASTROPHYSICAL JOURNAL,831(2).
MLA Huang, Jing,et al."QUASI-PERIODIC ACCELERATION OF ELECTRONS IN THE FLARE ON 2012 JULY 19".ASTROPHYSICAL JOURNAL 831.2(2016).
Files in This Item:
File Name/Size DocType Version Access License
QUASI-PERIODIC ACCEL(1640KB)期刊论文出版稿开放获取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
[Huang, Jing]'s Articles
[Kontar, Eduard P.]'s Articles
[Nakariakov, Valery M.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Huang, Jing]'s Articles
[Kontar, Eduard P.]'s Articles
[Nakariakov, Valery M.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Huang, Jing]'s Articles
[Kontar, Eduard P.]'s Articles
[Nakariakov, Valery M.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: QUASI-PERIODIC ACCELERATION OF ELECTRONS IN THE FLARE ON 2012 JULY 19.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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