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. |
项目资助者 | N/A |
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 |
URL | 查看原文 |
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 |
第一作者单位 | 中国科学院云南天文台 |
通讯作者单位 | 中国科学院云南天文台 |
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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