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Correlation of the observational characteristics of microwave type III bursts with CMEs
Ma Y(马媛)1; Xie RX(谢瑞祥)1; Zheng XM(郑向明)1; Liu, YY2; Yan, YH2; Fu, QJ2
Source PublicationIAU Symposium Proceedings Series - CORONAL AND STELLAR MASS EJECTIONS
2005
Issue226
Pages143-144
DOI10.1017/S1743921305000402
Author of SourceDere, K; Wang, J; Yan, Y
Contribution Rank第1完成单位
Indexed ByCPCI
Conference Name226th Symposium of the International-Astronomical-Union
Conference Date2004-09-13
Conference PlaceBeijing, PEOPLES R CHINA
Conference SponsorInt Astron Union, Div II; Chinese Acad Sci, Natl Astron Observat, Local Org Comm; Int Astron Union; Minist Sci & Technol; Natl Nat Sci Fdn China; Natl Sci Fdn; NASA, SOHO Project; SOHO/LASCO Project
KeywordSun : Coronal Mass Ejections (Cmes) Radio Radiation
Abstract

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.

Funding OrganizationN/A
Language英语
Subject Area天文学 ; 天体物理学 ; 太阳与太阳系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeProceedings Paper
PublisherCAMBRIDGE UNIV PRESS
Publication PlaceTHE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND
ISBN0-521-85197-1
ISSN1743-9213
URL查看原文
Archive Date2005-07-01
WOS IDWOS:000233166700034
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordRadio-emission ; Solar-flares
Citation statistics
Document Type会议论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6549
Collection太阳物理研究组
Corresponding AuthorMa Y(马媛)
Affiliation1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O.Box 110, 650011 Kunming, P.R.China
2.National Astronomical Observatories, Chinese Academy of Sciences 100012, Beijing, P.R.China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Ma Y,Xie RX,Zheng XM,et al. Correlation of the observational characteristics of microwave type III bursts with CMEs[C]//Dere, K; Wang, J; Yan, Y. THE PITT BUILDING, TRUMPINGTON ST, CAMBRIDGE CB2 1RP, CAMBS, ENGLAND:CAMBRIDGE UNIV PRESS,2005:143-144.
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