Gradual Solar Coronal Dimming and Evolution of Coronal Mass Ejectionin the Early Phase

doi:10.3847/2041-8213/aa6798

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	Gradual Solar Coronal Dimming and Evolution of Coronal Mass Ejectionin the Early Phase
	Qiu,Jiong 1; Cheng,Jianxia 2
刊名	The Astrophysical Journal Letters
	2017-03-24
卷号	838 期号:1
关键词	magnetic reconnection Sun: coronal mass ejections (CMEs) Sun: flares Sun: UV radiation
ISSN号	2041-8205
DOI	10.3847/2041-8213/aa6798
英文摘要	Abstract We report observations of a two-stage coronal dimming in an eruptive event of a two-ribbon flare and a fast coronal mass ejection (CME). Weak gradual dimming persists for more than half an hour before the onset of the two-ribbon flare and the fast rise of the CME. It is followed by abrupt rapid dimming. The two-stage dimming occurs in a pair of conjugate dimming regions adjacent to the two flare ribbons, and the flare onset marks the transition between the two stages of dimming. At the onset of the two-ribbon flare, transient brightenings are also observed inside the dimming regions, before rapid dimming occurs at the same places. These observations suggest that the CME structure, most probably anchored at the twin dimming regions, undergoes a slow rise before the flare onset, and its kinematic evolution has significantly changed at the onset of flare reconnection. We explore diagnostics of the CME evolution in the early phase with analysis of the gradual dimming signatures prior to the CME eruption.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:2041-8205-838-1-AA6798
内容类型	期刊论文
源URL	[http://119.78.226.72/handle/331011/32139]
专题	中国科学院上海天文台
作者单位	1.Department of Physics, Montana State University, Bozeman, MT 59717, USA; qiu@physics.montana.edu 2.CAS Key Laboratory of Planetary Sciences, Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China
推荐引用方式 GB/T 7714	Qiu,Jiong,Cheng,Jianxia. Gradual Solar Coronal Dimming and Evolution of Coronal Mass Ejectionin the Early Phase[J]. The Astrophysical Journal Letters,2017,838(1).
APA	Qiu,Jiong,&Cheng,Jianxia.(2017).Gradual Solar Coronal Dimming and Evolution of Coronal Mass Ejectionin the Early Phase.The Astrophysical Journal Letters,838(1).
MLA	Qiu,Jiong,et al."Gradual Solar Coronal Dimming and Evolution of Coronal Mass Ejectionin the Early Phase".The Astrophysical Journal Letters 838.1(2017).