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RELATIONSHIP BETWEEN DISTRIBUTION OF MAGNETIC DECAY INDEX AND FILAMENT ERUPTIONS
Li HB(李洪波)1,2
Source PublicationASTROPHYSICAL JOURNAL
2016-10-20
Volume830Issue:2
DOI10.3847/0004-637X/830/2/132
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun: activity Sun: filaments, prominences Sun: magnetic fields
Abstract

The decay index n of a horizontal magnetic field is considered to be an important parameter in judging the stability of a flux rope. However, the spatial distribution of this parameter has not been extensively explored so far. In this paper, we present a delineative study of the three-dimensional maps of n for two eruptive events, in which filaments underwent asymmetrical eruptions. The corresponding n-distributions are both found to show that the filaments tend to erupt at abnormal regions (dubbed ABN regions) of n. These ABN regions appear to be divided into two subregions, with larger and smaller n. Moreover, an analysis of the magnetic topological configuration of the ABN regions has been also performed. The results indicate that these ABN regions are associated with a kind of special quasi-separatrix layer across which the connectivity of magnetic field is discontinuous. The presented observations and analyses strongly suggest that the torus instability in ABN regions may play a crucial role for the triggering of an asymmetrical eruption. Additionally, our investigation can provide a way of forecasting how a filament might erupt, and predicting the location for an asymmetrically eruptive filament to be split through analyzing the spatial structure of n.

Funding ProjectNational Scientific Foundation of China (NSFC)[11073050] ; National Scientific Foundation of China (NSFC)[11533009] ; Key Laboratory of Geospace Environment, CAS, University of Science & Technology of China ; King Saud University ; Chinese Academy of Sciences[2012Y1JA0002]
Funding OrganizationNational Scientific Foundation of China (NSFC)[11073050, 11533009] ; Key Laboratory of Geospace Environment, CAS, University of Science & Technology of China ; King Saud University ; Chinese Academy of Sciences[2012Y1JA0002]
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
Archive Date2016-12-16
WOS IDWOS:000400471400001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCORONAL MASS EJECTIONS ; SOLAR ERUPTIONS ; FIELDS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9849
Collection选址与日冕观测组
Corresponding AuthorLi HB(李洪波)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.Graduate School of Chinese Academy of Science, Beijing 100049, China
3.Department of Physics and Astronomy, King Saud University, P.O. Box 2455, 11451, Saudi Arabia
Recommended Citation
GB/T 7714
Li HB. RELATIONSHIP BETWEEN DISTRIBUTION OF MAGNETIC DECAY INDEX AND FILAMENT ERUPTIONS[J]. ASTROPHYSICAL JOURNAL,2016,830(2).
APA Li HB.(2016).RELATIONSHIP BETWEEN DISTRIBUTION OF MAGNETIC DECAY INDEX AND FILAMENT ERUPTIONS.ASTROPHYSICAL JOURNAL,830(2).
MLA Li HB."RELATIONSHIP BETWEEN DISTRIBUTION OF MAGNETIC DECAY INDEX AND FILAMENT ERUPTIONS".ASTROPHYSICAL JOURNAL 830.2(2016).
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