| 由对偶的Ⅲ型射电爆发观测探讨日冕双向电子束的起源问题 |
| |
| 引用本文： | 谢瑞祥,傅其骏,汪敏,刘玉英.由对偶的Ⅲ型射电爆发观测探讨日冕双向电子束的起源问题[J].天文学报,2001,42(1):54-60. |
| |
| 作者姓名： | 谢瑞祥 傅其骏 汪敏 刘玉英 |
| |
| 作者单位： | 1. 中国科学院云南天文台；中国科学院北京天文台；中国科学院国家天文观测中心
2. 中国科学院北京天文台；中国科学院国家天文观测中心 |
| |
| 基金项目： | 国家自然科学基金(No.1983305和19773016)和中国科学院基金资助 |
| |
| 摘 要： | 介绍云南和北京天文台射电频谱仪观测到的3个对偶的米波－－微波Ⅲ型爆发，估计了双向电子束起源的频率和高度，3个事件分别揭示了在正向和反向漂移爆发之间的分界频率（约为250，1300和2900MHz),它们指出了一个致密的电子加速源，在这个源中产生了向上和向下两个方向注入的电子束，从这些事例可以表明不同事件的双向电子束的分界频率有一个相当大的范围（250－2900MHz)，而它们的起源范围却是在一个很小的（大约4－100MHz)和不同的频段范围内。最后讨论了日冕磁结构的拓扑范围、电子加速源构造的空间尺度、电子束运动速度和对偶Ⅲ型爆发的产生机制。
|
| 关 键 词： | 太阳日冕 Ⅲ型射电辐射 电子加速区 双向电子束 磁结构 |
| 修稿时间： | 1999年12月28 |
THE EXPLORATION OF BIDIRECTIONAL ELECTRON BEAMS ORIGINATING IN THE SOLAR CORONA WITH PAIRS OF TYPE Ⅲ RADIO BURSTS |
| |
| XIE Rui Xiang , FU Qi Jun , WANG Min , LIU Yu Ying.THE EXPLORATION OF BIDIRECTIONAL ELECTRON BEAMS ORIGINATING IN THE SOLAR CORONA WITH PAIRS OF TYPE Ⅲ RADIO BURSTS[J].Acta Astronomica Sinica,2001,42(1):54-60. |
| |
| Authors: | XIE Rui Xiang FU Qi Jun WANG Min LIU Yu Ying |
| |
| Institution: | XIE Rui Xiang 1,2,3 FU Qi Jun 2,3 WANG Min 1,2,3 LIU Yu Ying 2,3 |
| |
| Abstract: | Three pairs of type Ⅲ radio bursts from metric to microwave regions observed with radio spectrometers at Yunnan and Beijing Observatories are investigated. The frequencies and heights of bidirectional electron beams are estimated. Three events reveal a separatrix frequency (at about 250, 1300 and 2900 MHz) between normal and reverse drifting radio bursts. They indicate a compact acceleration source where electron beams are injected in both the upward and downward directions. These cases may indicate that the separatrix frequency region of bidirectional electron beams are within a large braodband from 250 to 2900 MHz and the originating ranges (frequency band of separatrix) are in a very small (4 to 100 MHz) and different bands. Finally, the magnetic structure topology range,the spatial organization size of the electron acceleration source, the motion velocity of electron beam and the mechanism of pair of type Ⅲ bursts are discussed. |
| |
| Keywords: | |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
