Investigation of White-light Emission in Circular-ribbon Flares

doi:10.3847/1538-4357/aae5d1

CORC > 国家天文台 > 中国科学院国家天文台

	Investigation of White-light Emission in Circular-ribbon Flares
	Song, Yongliang 1,2; Tian, Hui 2
刊名	ASTROPHYSICAL JOURNAL
	2018-11-10
卷号	867 期号:2 页码:13
关键词	Sun: activity Sun: chromosphere Sun: flares Sun: magnetic fields Sun: photosphere
ISSN号	0004-637X
DOI	10.3847/1538-4357/aae5d1
英文摘要	Using observations by the Solar Dynamics Observatory from 2010 June to 2017 December, we have performed the first statistical investigation of circular-ribbon flares (CFs) and examined the white-light emission in them. We find 90 CFs occurring in 36 active regions (ARs), including eight X-class, 34 M-class, and 48 C- and B-class flares. The occurrence rate of white-light flares (WLFs) is 100% (8/8) for X-class CFs, similar to 62% (21/34) for M-class CFs, and similar to 8% (4/48) for C- and B-class CFs. Sometimes we observe several CFs in a single AR, and nearly all of them are WLFs. Compared to normal CFs, those with white-light enhancement tend to have a shorter duration, smaller size, stronger electric current and more complicated magnetic field. We find that for X-class WLFs, the white-light enhancement is positively correlated with the flare class, implying that it is largely determined by the amount of released energy. However, there is no such correlation for M- and C-class WLFs, suggesting that other factors such as the timescale, spatial scale, and magnetic field complexity may play important roles in the generation of white-light emission if the released energy is not high enough.
资助项目	Strategic Priority Research Program of CAS[XDA17040507] ; CAS Key Laboratory of Solar Activity[KLSA201810] ; Max Planck Partner Group program ; Recruitment Program of Global Experts of China
WOS关键词	CORONAL MASS EJECTIONS ; HARD X-RAY ; FREE MAGNETIC-FIELDS ; MAJOR SOLAR EVENT ; ACTIVE-REGION ; CHROMOSPHERIC CONDENSATION ; CONTINUUM EMISSION ; EMERGING FLUX ; YOHKOH ; RECONNECTION
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000450221700026
资助机构	Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; CAS Key Laboratory of Solar Activity ; CAS Key Laboratory of Solar Activity ; Max Planck Partner Group program ; Max Planck Partner Group program ; Recruitment Program of Global Experts of China ; Recruitment Program of Global Experts of China ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; CAS Key Laboratory of Solar Activity ; CAS Key Laboratory of Solar Activity ; Max Planck Partner Group program ; Max Planck Partner Group program ; Recruitment Program of Global Experts of China ; Recruitment Program of Global Experts of China ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; CAS Key Laboratory of Solar Activity ; CAS Key Laboratory of Solar Activity ; Max Planck Partner Group program ; Max Planck Partner Group program ; Recruitment Program of Global Experts of China ; Recruitment Program of Global Experts of China ; Strategic Priority Research Program of CAS ; Strategic Priority Research Program of CAS ; CAS Key Laboratory of Solar Activity ; CAS Key Laboratory of Solar Activity ; Max Planck Partner Group program ; Max Planck Partner Group program ; Recruitment Program of Global Experts of China ; Recruitment Program of Global Experts of China
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/23327]
专题	中国科学院国家天文台
通讯作者	Tian, Hui
作者单位	1.Chinese Acad Sci, Key Lab Solar Act, Natl Astron Observ, Beijing 100012, Peoples R China 2.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Song, Yongliang,Tian, Hui. Investigation of White-light Emission in Circular-ribbon Flares[J]. ASTROPHYSICAL JOURNAL,2018,867(2):13.
APA	Song, Yongliang,&Tian, Hui.(2018).Investigation of White-light Emission in Circular-ribbon Flares.ASTROPHYSICAL JOURNAL,867(2),13.
MLA	Song, Yongliang,et al."Investigation of White-light Emission in Circular-ribbon Flares".ASTROPHYSICAL JOURNAL 867.2(2018):13.