FINE STRUCTURES AND OVERLYING LOOPS OF CONFINED SOLAR FLARES

	FINE STRUCTURES AND OVERLYING LOOPS OF CONFINED SOLAR FLARES
	Yang, SH 1; Zhang, J1 ; Xiang YY(向永源)2
刊名	ASTROPHYSICAL JOURNAL LETTERS
	2014-10-01
卷号	793 期号:2
关键词	Sun: atmosphere Sun: evolution Sun: flares Sun: magnetic fields
ISSN号	2041-8205
通讯作者	Yang, SH (reprint author), Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China.
产权排序	第二完成单位
英文摘要	Using the H alpha observations from the New Vacuum Solar Telescope at the Fuxian Solar Observatory, we focus on the fine structures of three confined flares and the issue why all the three flares are confined instead of eruptive. All the three confined flares take place successively at the same location and have similar morphologies, so can be termed homologous confined flares. In the simultaneous images obtained by the Solar Dynamics Observatory, many large-scale coronal loops above the confined flares are clearly observed in multi-wavelengths. At the pre-flare stage, two dipoles emerge near the negative sunspot, and the dipolar patches are connected by small loops appearing as arch-shaped H alpha fibrils. There exists a reconnection between the small loops, and thus the H alpha fibrils change their configuration. The reconnection also occurs between a set of emerging H alpha fibrils and a set of pre-existing large loops, which are rooted in the negative sunspot, a nearby positive patch, and some remote positive faculae, forming a typical three-legged structure. During the flare processes, the overlying loops, some of which are tracked by activated dark materials, do not break out. These direct observations may illustrate the physical mechanism of confined flares, i.e., magnetic reconnection between the emerging loops and the pre-existing loops triggers flares and the overlying loops prevent the flares from being eruptive.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	CORONAL MASS EJECTIONS ; DYNAMICS-OBSERVATORY SDO ; MAGNETIC RECONNECTION ; SPECKLE MASKING ; FAILED ERUPTION ; HIGH-RESOLUTION ; FLUX ROPES ; FILAMENT ; MECHANISM ; ONSET
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/2041-8205/793/2/L28/meta
语种	英语
WOS记录号	WOS:000341885900007
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4703]
专题	云南天文台_抚仙湖太阳观测站
作者单位	1.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China 2.Fuxian Solar Observatory, Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011, China
推荐引用方式 GB/T 7714	Yang, SH,Zhang, J,Xiang YY. FINE STRUCTURES AND OVERLYING LOOPS OF CONFINED SOLAR FLARES[J]. ASTROPHYSICAL JOURNAL LETTERS,2014,793(2).
APA	Yang, SH,Zhang, J,&Xiang YY.(2014).FINE STRUCTURES AND OVERLYING LOOPS OF CONFINED SOLAR FLARES.ASTROPHYSICAL JOURNAL LETTERS,793(2).
MLA	Yang, SH,et al."FINE STRUCTURES AND OVERLYING LOOPS OF CONFINED SOLAR FLARES".ASTROPHYSICAL JOURNAL LETTERS 793.2(2014).