PMO OpenIR  > 太阳活动的多波段观测研究团组
Evidence of two-stage magnetic reconnection in the 2005 January 15 X2.6 flare
Wang, Pu1; Li, Yixuan2; Ding, Mingde1; Ji, Haisheng3,4; Wang, Haimin2
2011-11-01
Source PublicationNEW ASTRONOMY
ISSN1384-1076
Volume16Issue:7Pages:470-476
AbstractWe analyze in detail the X2.6 flare that occurred on 2005 January 15 in the NOAA AR 10720 using multiwavelength observations. There are several interesting properties of the flare that reveal possible two-stage magnetic reconnection similar to that in the physical picture of tether-cutting, where the magnetic fields of two separate loop systems reconnect at the flare core region, and subsequently a large flux rope forms, erupts, and breaks open the overlying arcade fields. The observed manifestations include: (1) remote Fix brightenings appear minutes before the main phase of the flare; (2) separation of the flare ribbons has a slow and a fast phase, and the flare hard X-ray emission appears in the later fast phase; (3) rapid transverse field enhancement near the magnetic polarity inversion line (PIL) is found to be associated with the flare. We conclude that the flare occurrence fits the tether-cutting reconnection picture in a special way, in which there are three flare ribbons outlining the sigmoid configuration. We also discuss this event in the context of what was predicted by Hudson et al. (2008), where the Lorentz force near the flaring PIL drops after the flare and consequently the magnetic field lines there turn to be more horizontal as we observed. (C) 2011 Elsevier B.V. All rights reserved.
KeywordSun: Corona Sun: Flares Sun: Activity Sun: Magnetic Fields
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1016/j.newast.2011.04.002
WOS KeywordCORONAL MASS EJECTIONS ; SOLAR ACTIVE-REGION ; X-CLASS FLARES ; FIELD CHANGES ; H-ALPHA ; RAPID CHANGES ; RAY FLARE ; ENERGY ; BRIGHTENINGS ; RADIO
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000291915600007
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/4505
Collection太阳活动的多波段观测研究团组
Affiliation1.Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China
2.New Jersey Inst Technol, Space Weather Res Lab, Newark, NJ 07102 USA
3.Chinese Acad Sci, Key Lab Dark Matter & Space Sci, Nanjing 210008, Peoples R China
4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Wang, Pu,Li, Yixuan,Ding, Mingde,et al. Evidence of two-stage magnetic reconnection in the 2005 January 15 X2.6 flare[J]. NEW ASTRONOMY,2011,16(7):470-476.
APA Wang, Pu,Li, Yixuan,Ding, Mingde,Ji, Haisheng,&Wang, Haimin.(2011).Evidence of two-stage magnetic reconnection in the 2005 January 15 X2.6 flare.NEW ASTRONOMY,16(7),470-476.
MLA Wang, Pu,et al."Evidence of two-stage magnetic reconnection in the 2005 January 15 X2.6 flare".NEW ASTRONOMY 16.7(2011):470-476.
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