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Speed Distributions of CMEs in Cycle 23 at Low and High Latitudes
PengXin Gao; KeJun Li
2008
Source PublicationChinese Astronomy and Astrophysics
ISSN0275-1062
Volume8Issue:2Pages:146
AbstractWe analyzed the speed (v) distributions of 11584 coronal mass ejections (CMEs) observed by the Large Angle and Spectrometric Coronagraph Experiment on board the Solar and Heliospheric Observatory (SOHO/LASCO) in cycle 23 from 1996 to 2006. We find that the speed distributions for high-latitude (HL) and low-latitude (LL) CME events are nearly identical and to a good approximation they can be fitted with a lognormal distribution. This finding implies that statistically the same driving mechanism of a nonlinear nature is acting in both HL and LL CME events, and CMEs are intrinsically associated with the source's magnetic structure on large spatial scales. Statistically, the HL CMEs are slightly slower than the LL CMEs. For HL and LL CME events respectively, the speed distributions for accelerating and decelerating events are nearly identical and also to a good approximation they can be both fitted with a lognormal distribution, thus supplementing the results obtained by Yurchyshyn et al.
KeywordSun activity - Sun coronal mass ejections (CMEs)
Language英语
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/63864
Collection中国科学院国家天文台
Affiliation中国科学院国家天文台
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
PengXin Gao,KeJun Li. Speed Distributions of CMEs in Cycle 23 at Low and High Latitudes[J]. Chinese Astronomy and Astrophysics,2008,8(2):146.
APA PengXin Gao,&KeJun Li.(2008).Speed Distributions of CMEs in Cycle 23 at Low and High Latitudes.Chinese Astronomy and Astrophysics,8(2),146.
MLA PengXin Gao,et al."Speed Distributions of CMEs in Cycle 23 at Low and High Latitudes".Chinese Astronomy and Astrophysics 8.2(2008):146.
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