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Time Variation of Two-dimensional Multi-parameter Fields of the Flare on 1989 August 17
Gu XM(顾啸马); Li KJ(李可军); Dun JP(敦金平); Zhong SH(钟树华)
会议录名称The Proceedings of the IAU 8th Asian-Pacific Regional Meeting
2002
页码425-426
会议录编者/会议主办者S. Ikeuchi, J. Hearnshaw, and T. Hanawa, the Astronomical Society of Japan
产权排序第1完成单位
收录类别其他
会议名称the IAU 8th Asian-Pacific Regional Meeting
会议日期2002-07-02
会议地点National Center of Sciences, Hitotsubashi Memorial Hall, Tokyo
摘要

Two-dimensional (2D) hb spectral data of the post-flare loop system (PFLs) of 1989 Aug. 17, taken at three different times were analyzed quantitatively at Yunnan Observatory. Four physical parameters (line-of-sight velocity Vr, column number density of hydrogen atoms at the second level along line of sight N2, excitation temperature Tex and micro-turbulent velocity Vt) and their 2D fields were obtained for the three time intervals. The 2D fields of N2, Tex and Vt at different times all display some inhomogeneous and asymmetric properties, but they are decreasing with time. Values of N2, Tex in the south leg are all higher than those in the north leg, but the differences between them are gradually reduced. The maximum of N2 changes from 40 to 30 then 20 × 1012 cm-2, while the maximum of Tex almost stays at the value of 2.0 to 2.2 × 104 K during the three time intervals. A high temperature region in the middle of the south leg moves towards the top part of the loop system. The value of Vt at the top part is bigger than that in the two legs, and its maximum also decreases from 45 to 20 km/s. The rate of variation of the maxima N2 and Vt from the the first interval to the second is greater than that from the second interval to the third one, while the variation rate of the maximum of Tex is nearly unchanged during the three time intervals.

语种英语
学科领域天文学 ; 天体物理学 ; 太阳与太阳系
学科门类理学 ; 理学::天文学
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归档日期2004-04-27
文献类型会议论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6544
专题太阳物理研究组
通讯作者Gu XM(顾啸马); Li KJ(李可军)
作者单位Yunnan Observatory, NAO, CAS, Kunming, 650011, China
推荐引用方式
GB/T 7714
Gu XM,Li KJ,Dun JP,et al. Time Variation of Two-dimensional Multi-parameter Fields of the Flare on 1989 August 17[C]//S. Ikeuchi, J. Hearnshaw, and T. Hanawa, the Astronomical Society of Japan,2002:425-426.
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