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Correlation of the observational characteristics of microwave type III bursts with CMEs
Ma Y(马媛); Xie RX(谢瑞祥); Zheng XM(郑向明); Liu, YY; Yan, YH; Fu, QJ; Ma, Y (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
会议录名称IAU Symposium Proceedings Series - CORONAL AND STELLAR MASS EJECTIONS
2005
期号226
页码143-144
产权排序第1完成单位
收录类别CPCI
会议名称226th Symposium of the International-Astronomical-Union
会议日期2004-09-13
会议地点Beijing, PEOPLES R CHINA
关键词Sun : Coronal Mass Ejections (Cmes) Radio Radiation
摘要A total of 266 type III bursts observed with the 2.6 - 3.8 GHz high temporal resolution dynamic spectrometer of NAOC during the 23rd solar cycle (from April in 1998 to January III 2003) are statistically analyzed in this present paper. The frequeucy drift rates (normal and reverse slop), durations, polarizations, bandwidth, starting and ending frequencies are analyzed in detail. From the statistical results of starting and ending frequencies we show that the re-ions of starting frequencies are very large, which are from less than 2.6 GHz to greater than 3.8 GHz; but the ending frequencies regions are relative concentration, which are from 2.82 GHz to 3.76 GHz. These phenomena mean that the sites of electrons acceleration are quite scatter, while the cutoff regions of the radio type III bursts are in the limiting domain. The bursts number with positive and negative drift rates are nearly equal. This correlation may interpret the suggest that a proportional number of electron beams in the directions of upward and downward are accelerated in the range of 2.6 - 3.8 GHz. The other statistical results are similar to those of decimetric type III bursts as statistics in previous literature. The emission mechanisms of microwave type III bursts are mainly caused by the plasma radiation and electron gyro-maser radiation. From the statistics of microwave type III bursts and associated coronal mass ejections (CMEs), it is found that the 36% of type III bursts (97) are corresponding to the CMEs for occurring time and site. The correlation between the type III bursts and CMEs is not close, and most type III bursts are occurred in the time regions of 26 - 30 minutes before CMEs. This means that the partial microwave type III bursts may be a precursor of the CMEs.
语种英语
学科领域Astronomy & Astrophysics
出版者CAMBRIDGE UNIV PRESS
出版地THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
ISBN号0-521-85197-1
ISSN号1743-9213
URL查看原文
归档日期2005-07-01
文献类型会议论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6549
专题太阳物理研究组
通讯作者Ma, Y (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
推荐引用方式
GB/T 7714
Ma Y,Xie RX,Zheng XM,et al. Correlation of the observational characteristics of microwave type III bursts with CMEs[C]. THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND:CAMBRIDGE UNIV PRESS,2005:143-144.
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