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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; Hong, JC (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL
2014-12-01
卷号796期号:2
DOI10.1088/0004-637X/796/2/73
产权排序第1完成单位
收录类别SCI
关键词Sun: Corona Sun: Evolution Sun: Filaments Prominences
摘要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.
项目资助者973 Program [2011CB811403] ; Natural Science Foundation of China [11173058, 11333007, 11273056] ; CAS [KJCX2-EW-T07]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
归档日期2014-11-18
WOS记录号WOS:000344878900003
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]DIFFERENTIAL EMISSION MEASURE ; X-RAY JETS ; EPHEMERAL ACTIVE REGIONS ; H-ALPHA SURGES ; QUIET-SUN ; SOLAR CORONA ; MAGNETIC RECONNECTION ; FILAMENT ERUPTION ; KINK INSTABILITY ; MASS EJECTIONS
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6239
专题太阳物理研究组
通讯作者Hong, JC (reprint author), Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China.
作者单位1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
2.Graduate School of Chinese Academy of Sciences, Beijing, China
推荐引用方式
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.,...&Hong, JC .(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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