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Was the flare on 5 July 1989 a white light flare?
Li KJ(李可军)1,2; Zhong SH(钟树华)2; Li, KJ
发表期刊ASTRONOMY & ASTROPHYSICS
1997-01
卷号317期号:1页码:248-253
产权排序第2完成单位
收录类别SCI
关键词Sun: Activity Sun: Flare Sun: Magnetic Fields
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.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6361
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WOS记录号WOS:A1997WP87200043
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6023
专题太阳物理研究组
通讯作者Li, KJ
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
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Li KJ,Zhong SH,Li, KJ. Was the flare on 5 July 1989 a white light flare?[J]. ASTRONOMY & ASTROPHYSICS,1997,317(1):248-253.
APA Li KJ,Zhong SH,&Li, KJ.(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.
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