Cluster of solar active regions and onset of coronal mass ejections

	Cluster of solar active regions and onset of coronal mass ejections
	Wang JingXiu1 ; Zhang YuZong1 ; He Han1 ; Chen AnQin 2; Jin ChunLan1 ; Zhou GuiPing1
刊名	SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
	2015-09-01
卷号	58 期号:9
关键词	activity coronal mass ejection magnetic fields
英文摘要	round-the-clock solar observations with full-disk coverage of vector magnetograms and multi-wavelength images demonstrate that solar active regions (ARs) are ultimately connected with magnetic field. Often two or more ARs are clustered, creating a favorable magnetic environment for the onset of coronal mass ejections (CMEs). In this work, we describe a new type of magnetic complex: cluster of solar ARs. An AR cluster is referred to as the close connection of two or more ARs which are located in nearly the same latitude and a narrow span of longitude. We illustrate three examples of AR clusters, each of which has two ARs connected and formed a common dome of magnetic flux system. They are clusters of NOAA (i.e., National Oceanic and Atmospheric Administration) ARs 11226 & 11227, 11429 & 11430, and 11525 & 11524. In these AR clusters, CME initiations were often tied to the instability of the magnetic structures connecting two partner ARs, in the form of inter-connecting loops and/or channeling filaments between the two ARs. We show the evidence that, at least, some of the flare/CMEs in an AR cluster are not a phenomenon of a single AR, but the result of magnetic interaction in the whole AR cluster. The observations shed new light on understanding the mechanism(s) of solar activity. Instead of the simple bipolar topology as suggested by the so-called standard flare model, a multi-bipolar magnetic topology is more common to host the violent solar activity in solar atmosphere.
收录类别	SCI
语种	英语
WOS记录号	WOS:000360834200011
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5617]
专题	国家天文台_射电天文研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China 2.China Meteorol Adm, Natl Ctr Space Weather, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Wang JingXiu,Zhang YuZong,He Han,et al. Cluster of solar active regions and onset of coronal mass ejections[J]. SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,2015,58(9).
APA	Wang JingXiu,Zhang YuZong,He Han,Chen AnQin,Jin ChunLan,&Zhou GuiPing.(2015).Cluster of solar active regions and onset of coronal mass ejections.SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY,58(9).
MLA	Wang JingXiu,et al."Cluster of solar active regions and onset of coronal mass ejections".SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY 58.9(2015).