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CORONAL BRIGHT POINTS ASSOCIATED WITH MINIFILAMENT ERUPTIONS
Hong JC(洪俊超)1; Jiang YC(姜云春)1; Yang JY(杨家艳)1; Bi Y(毕以)1; Li HD(李海东)1; Yang B(杨波)1,2; Yang D(杨丹)1,2
Source PublicationASTROPHYSICAL JOURNAL
2014-12-01
Volume796Issue:2
DOI10.1088/0004-637X/796/2/73
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun: corona Sun: evolution Sun: filaments, prominences
Abstract

Coronal bright points (CBPs) are small-scale, long-lived coronal brightenings that always correspond to photospheric network magnetic features of opposite polarity. In this paper, we subjectively adopt 30 CBPs in a coronal hole to study their eruptive behavior using data from the Atmospheric Imaging Assembly (AIA) and the Helioseismic and Magnetic Imager (HMI) on board the Solar DynamicsObservatory. About one-quarter to one-third of the CBPs in the coronal hole go through one or more minifilament eruption(s) (MFE(s)) throughout their lifetimes. The MFEs occur in temporal association with the brightness maxima of CBPs and possibly result from the convergence and cancellation of underlying magnetic dipoles. Two examples of CBPs with MFEs are analyzed in detail, where minifilaments appear as dark features of a cool channel that divide the CBPs along the neutral lines of the dipoles beneath. The MFEs show the typical rising movements of filaments and mass ejections with brightenings at CBPs, similar to large-scale filament eruptions. Via differential emission measure analysis, it is found that CBPs are heated dramatically by their MFEs and the ejected plasmas in the MFEs have average temperatures close to the pre-eruption BP plasmas and electron densities typically near 10(9) cm(-3). These new observational results indicate that CBPs are more complex in dynamical evolution and magnetic structure than previously thought.

Funding Project973 Program[2011CB811403] ; Natural Science Foundation of China[11173058] ; Natural Science Foundation of China[11333007] ; Natural Science Foundation of China[11273056] ; CAS[KJCX2-EW-T07]
Funding Organization973 Program[2011CB811403] ; Natural Science Foundation of China[11173058, 11333007, 11273056] ; CAS[KJCX2-EW-T07]
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 Date2014-11-18
WOS IDWOS:000344878900003
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordDIFFERENTIAL EMISSION MEASURE ; X-RAY JETS ; EPHEMERAL ACTIVE REGIONS ; H-ALPHA SURGES ; QUIET-SUN ; SOLAR CORONA ; MAGNETIC RECONNECTION ; FILAMENT ERUPTION ; KINK INSTABILITY ; MASS EJECTIONS
Citation statistics
Cited Times:25[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6239
Collection太阳物理研究组
Corresponding AuthorHong JC(洪俊超)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.Graduate School of Chinese Academy of Sciences, Beijing, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Hong JC,Jiang YC,Yang JY,et al. CORONAL BRIGHT POINTS ASSOCIATED WITH MINIFILAMENT ERUPTIONS[J]. ASTROPHYSICAL JOURNAL,2014,796(2).
APA Hong JC.,Jiang YC.,Yang JY.,Bi Y.,Li HD.,...&Yang D.(2014).CORONAL BRIGHT POINTS ASSOCIATED WITH MINIFILAMENT ERUPTIONS.ASTROPHYSICAL JOURNAL,796(2).
MLA Hong JC,et al."CORONAL BRIGHT POINTS ASSOCIATED WITH MINIFILAMENT ERUPTIONS".ASTROPHYSICAL JOURNAL 796.2(2014).
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