YNAO OpenIR  > 抚仙湖太阳观测站
Homologous Circular-ribbon Flares Driven by Twisted Flux Emergence
Xu Z(徐稚)1; Yang, Kai2; Guo, Yang2; Zhao, Jie3; Zhao ZJ(赵志军)1; L. Kashapova4
Source PublicationASTROPHYSICAL JOURNAL
2017-12-10
Volume851Issue:1Pages:1-11
DOI10.3847/1538-4357/aa9995
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun: filaments, prominences Sun: flares Sun: magnetic fields
Abstract

In this paper, we report two homologous circular-ribbon flares associated with two filament eruptions. They were well observed by the New Vacuum Solar Telescope and the Solar Dynamics Observatory on 2014 March 5. Prior to the flare, two small-scale filaments enclosed by a circular pre-flare brightening lie along the circular polarity inversion line around the parasitic polarity, which has shown a continuous rotation since its first appearance. Two filaments eventually erupt in sequence associated with two homologous circular-ribbon flares and display an apparent writhing signature. Supplemented by the nonlinear force-free field extrapolation and the magnetic field squashing factor investigation, the following are revealed. (1) This event involves the emergence of magnetic flux ropes into a pre-existing polarity area, which yields the formation of a 3D null-point topology in the corona. (2) Continuous input of the free energy in the form of a flux rope from beneath the photosphere may drive a breakout-type reconnection occurring high in the corona, supported by the pre-flare brightening. (3) This initiation reconnection could release the constraint on the flux rope and trigger the MHD instability to first make filament F1 lose equilibrium. The subsequent more violent magnetic reconnection with the overlying flux is driven during the filament rising. In return, the eruption of filament F2 is further facilitated by the reduction of the magnetic tension force above. These two processes form a positive feedback to each other to cause the energetic mass eruption and flare.

Funding ProjectNSFC[11473064] ; NSFC[11533005] ; NSFC[11203014] ; NSFC[11503089]
Funding OrganizationNSFC[11473064, 11533005, 11203014, 11503089]
Language英语
Subject Area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:000417483700001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCORONAL MASS EJECTIONS ; MAGNETIC INDUCTION EQUATION ; QUASI-SEPARATRIX LAYERS ; VACUUM SOLAR TELESCOPE ; NULL POINTS ; RECONNECTION DRIVEN ; HIGH-RESOLUTION ; RECONSTRUCTION ; FIELD ; TOPOLOGY
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12069
Collection抚仙湖太阳观测站
Corresponding AuthorXu Z(徐稚)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.School of Astronomy and Space Science, Nanjing University, Nanjing 210023, China
3.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China
4.Institute of Solar-Terrestrial-Physics SB RAS, Irkutsk, Russia
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Xu Z,Yang, Kai,Guo, Yang,et al. Homologous Circular-ribbon Flares Driven by Twisted Flux Emergence[J]. ASTROPHYSICAL JOURNAL,2017,851(1):1-11.
APA Xu Z,Yang, Kai,Guo, Yang,Zhao, Jie,Zhao ZJ,&L. Kashapova.(2017).Homologous Circular-ribbon Flares Driven by Twisted Flux Emergence.ASTROPHYSICAL JOURNAL,851(1),1-11.
MLA Xu Z,et al."Homologous Circular-ribbon Flares Driven by Twisted Flux Emergence".ASTROPHYSICAL JOURNAL 851.1(2017):1-11.
Files in This Item:
File Name/Size DocType Version Access License
Homologous Circular-(3328KB)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
[Xu Z(徐稚)]'s Articles
[Yang, Kai]'s Articles
[Guo, Yang]'s Articles
Baidu academic
Similar articles in Baidu academic
[Xu Z(徐稚)]'s Articles
[Yang, Kai]'s Articles
[Guo, Yang]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Xu Z(徐稚)]'s Articles
[Yang, Kai]'s Articles
[Guo, Yang]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: Homologous Circular-ribbon Flares Driven by Twisted Flux Emergence.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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