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Two-dimensional multi-parameter fields of a limb flare loop system
Gu XM(顾啸马)1,2; Dun JP(敦金平)1; Zhong SH(钟树华)1; Gu, XM (reprint author), CAS, Yunnan Observ, Kunming 650011, Peoples R China.
发表期刊ASTRONOMY & ASTROPHYSICS
2001-12
卷号380期号:2页码:704-713
DOI10.1051/0004-6361:20011251
产权排序第1完成单位
收录类别SCI ; EI
关键词Sun : Flares Sun : Fundamental Parameters
摘要The 2D H-beta spectral data of the post-flare loop system (PFLs) of August 17, 1989 are obtained and analyzed quantitatively. Four physical parameters (the line-of-sight velocity V-//, column number density of the hydrogen atoms at the second level along the line-of-sight direction N-2, the excitation temperature T-ex and the micro-turblence velocity V-t) and their 2D distributions are derived. The 2D fields of V-//, N-2, T-ex and V-t exhibit inhomogeneous and asymmetric properties in two loop legs. Red-shift velocities in the south leg are smaller than those of blue shift in the north leg where the velocity reaches 60 km s(-1). The values of N-2 and T-ex in the south leg are all much higher than those in the north leg, N-2 ranges between 0.5 to 4.5 x 10(13) cm(-2), while T-ex ranges from 0.8 to 2.2 x 10(4) K, lower at the top part than in the two legs. A high temperature region is located in the middle of the south leg. V-t at the top part is greater than that in the two legs, with the average being 30 similar to 40 km s(-1). Electron density n(e) and electron pressure P-e are estimated at 0.2 similar to 0.6 x 10(11) cm(-3) and at 0.04 similar to 0.12 dyn cm(-2), respectively. These results are compared with those obtained from the PFLs of 1984 February 18.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6361
URL查看原文
归档日期2001-12-13
WOS记录号WOS:000172620600032
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]MAGNETIC RECONNECTION ; PROMINENCES ; COOL ; EVOLUTION ; PROFILES
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6038
专题太阳物理研究组
通讯作者Gu, XM (reprint author), CAS, Yunnan Observ, Kunming 650011, Peoples R China.
作者单位1.Yunnan Observatory, CAS, Kunming 650011 and National Astronomical Observatories, CAS,
2.United Laboratory of Optical Astronomy, CAS, Shanghai 200030, PR China
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Gu XM,Dun JP,Zhong SH,et al. Two-dimensional multi-parameter fields of a limb flare loop system[J]. ASTRONOMY & ASTROPHYSICS,2001,380(2):704-713.
APA Gu XM,Dun JP,Zhong SH,&Gu, XM .(2001).Two-dimensional multi-parameter fields of a limb flare loop system.ASTRONOMY & ASTROPHYSICS,380(2),704-713.
MLA Gu XM,et al."Two-dimensional multi-parameter fields of a limb flare loop system".ASTRONOMY & ASTROPHYSICS 380.2(2001):704-713.
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