Was the flare on 5 July 1989 a white light flare?

	Was the flare on 5 July 1989 a white light flare?
	Li KJ(李可军)1,2; Zhong SH(钟树华)2
刊名	ASTRONOMY & ASTROPHYSICS
	1997-01
卷号	317 期号:1 页码:248-253
关键词	Sun: activity Sun: flare Sun: magnetic fields
ISSN号	0004-6361
通讯作者	Li, KJ
产权排序	第二完成单位
英文摘要	The continuous emission spectra of H alpha, H beta, and H-gamma wave bands of the solar hare of 5 July 1989 have been analysed. We demonstrate that the flare not only emits at the line centres and wings of H alpha, H beta, and H gamma, but also in the continuum near these lines. The positions, durations, and configurations of the four flare kernels are respectively similar to those of a white light flare (WLF). Therefore we conclude that this flare was very likely a WLF The magnetic field of the active region has also been analysed. Most of the flare is located in the vicinity of the neutral line of the magnetic field. Three of the four flare kernels that have continuous emissions lie in the penumbrae of the preceding sunspot and the following sunspot, and near the neutral line, where the magnetic field shears, twists, and shows evidences of having been squeezed or compressed. The fourth kernel of the flare is located in the photospheric region near a small sunspot (about 4'' in size). The flare kernel with the brightest continuous emission is located at a point where the gradient of the longitudinal magnetic field has maximum value (0.52 Gs/Km). Thus the magnetic field at the flare kernels is of two kinds: one showing twist, shear, and possible compression, the other in the photospheric region near a sunspot group or a sunspot. The total energy of the flare is estimated to be about 3.8 x 10(30) erg.
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
收录类别	SCI
原文出处	http://adsabs.harvard.edu/abs/1997A%26A...317..248L
语种	英语
WOS记录号	WOS:A1997WP87200043
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/6023]
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, Chinese Academy of Sciences, Yunnan 650011, China
推荐引用方式 GB/T 7714	Li KJ,Zhong SH. Was the flare on 5 July 1989 a white light flare?[J]. ASTRONOMY & ASTROPHYSICS,1997,317(1):248-253.
APA	Li KJ,&Zhong SH.(1997).Was the flare on 5 July 1989 a white light flare?.ASTRONOMY & ASTROPHYSICS,317(1),248-253.
MLA	Li KJ,et al."Was the flare on 5 July 1989 a white light flare?".ASTRONOMY & ASTROPHYSICS 317.1(1997):248-253.