Time evolution and morphological characteristics of white light flare on 18 January 1989

	Time evolution and morphological characteristics of white light flare on 18 January 1989
	Xuan JY(宣家余)2; Gu XM(顾啸马)1,2; Lin J(林隽)2; Jiang YC(姜云春)2; Zhong SH(钟树华)2; Li YS(李永生)2
刊名	ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES
	1998-05
卷号	129 期号:3 页码:553-561
关键词	sun flares
ISSN号	0365-0138
通讯作者	Xuan, JY
产权排序	第二完成单位
英文摘要	Some properties of the white light flare (WLF) that occurred on 18 January 1989 are presented. The flare consisted of 7 patched-shape kernels, with sizes (1.5 similar to 4) 10(17) cm(2). The lifetimes of the kernels were from several minutes to more than 40 minutes. The initial bright points of the WLF kernels originated between the umbra and penumbra in penumbra fibrils, between penumbra fibrils and the photosphere, or on the photosphere and light bridge. These kernels appeared 2 to 3 minutes after H alpha flares, and reached their maxima respectively before the first maximum and 1 to 2 minutes before the second maximum of the H alpha flare, and disappeared slowly before the disappearance of the H alpha flare. The direction and size of material motion in the kernels are different. The precur sors of the WLF are similar to those of ordinary flares. The magnetic pattern of the photosphere in the active region is in delta- structure, and the kernels lie at or near the changing magnetic neutral lines. The small longitudinal field gradient may be constrained by the small transverse field on the photosphere. The flare exhibited both temporal and spatial properties in the center reversal and line-width of H alpha profiles, and has characteristics of both class I and II. Thus it may be a mixed-class white light flare.
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]	K-LINE PROFILES ; CHROMOSPHERIC FLARES ; NONTHERMAL PROCESSES ; MAGNETIC-FIELD ; H-ALPHA ; DIAGNOSTICS ; JUNE
收录类别	SCI
原文出处	http://aas.aanda.org/articles/aas/abs/1998/09/ds4135/ds4135.html
语种	英语
WOS记录号	WOS:000073690800012
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6027]
专题	云南天文台_太阳物理研究组
作者单位	1.CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, China 2.Yunnan Observatory, P.O. Box 110, Kunming 650011, China
推荐引用方式 GB/T 7714	Xuan JY,Gu XM,Lin J,et al. Time evolution and morphological characteristics of white light flare on 18 January 1989[J]. ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES,1998,129(3):553-561.
APA	Xuan JY,Gu XM,Lin J,Jiang YC,Zhong SH,&Li YS.(1998).Time evolution and morphological characteristics of white light flare on 18 January 1989.ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES,129(3),553-561.
MLA	Xuan JY,et al."Time evolution and morphological characteristics of white light flare on 18 January 1989".ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES 129.3(1998):553-561.