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Distribution of latitudes and speeds of coronal mass ejections in the northern and southern hemispheres in cycle 23
Gao PX(高朋鑫)1,2; Li QX(李启秀)1,2; Zhong SH(钟树华)1; Gao, PX (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Yunnan, Peoples R China.
Source PublicationJOURNAL OF ASTROPHYSICS AND ASTRONOMY
2007-12
Volume28Issue:4Pages:207-215
DOI10.1007/s12036-007-0018-2
Contribution Rank第1完成单位
Indexed BySCI
KeywordSun : Activity Sun : Coronal Mass Ejections (Cmes)
AbstractDistribution of latitudes and speeds of Coronal Mass Ejections (CMEs) in the northern and southern hemispheres in cycle 23, from September 1996 to December 2006, have been analyzed. By calculating the actual probability of the hemispheric distribution of the activity of the CME, we find that a southern dominance of the activity of the CME is shown to occur in cycle 23 from September 1996 to December 2006. The CME activity occurs at all latitudes and is most common at low latitudes. This should furnish evidence to support that CMEs are associated with source magnetic structures on a large spatial scale, even with transequatorial source magnetic structures on a large spatial scale. The latitudinal distribution of CMEs in the northern and southern hemispheres are no different from a statistical point of view. The speed distribution in the northern and southern hemispheres are nearly identical and to a good approximation they can be fitted with a single lognormal distribution. This finding implies that, statistically, there is no physical distinction between the CME events in the southern and northern hemispheres and the same mechanism of a nonlinear nature acting in both the CME events in the northern and southern hemispheres. Our conclusions seem to suggest that the northernsouthern asymmetry of the CME events is related to the northern-southern asymmetry in solar dynamo theory.
Language英语
Subject AreaAstronomy & Astrophysics
SubtypeArticle
ISSN0250-6335
URL查看原文
Archive Date2008-03-24
WOS IDWOS:000254050200005
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordUPPER CONVECTION ZONE ; SOLAR-CYCLE ; SMM OBSERVATIONS ; FLARE INDEX ; EARTH ; ASYMMETRY ; TIME ; 1-AU
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6100
Collection太阳物理研究组
Corresponding AuthorGao, PX (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Yunnan, Peoples R China.
Affiliation1.National Astronomical Observatories/Yunnan Observatory, CAS, Kunming, Yunnan, China
2.School of Graduate, CAS, Beijing, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Gao PX,Li QX,Zhong SH,et al. Distribution of latitudes and speeds of coronal mass ejections in the northern and southern hemispheres in cycle 23[J]. JOURNAL OF ASTROPHYSICS AND ASTRONOMY,2007,28(4):207-215.
APA Gao PX,Li QX,Zhong SH,&Gao, PX .(2007).Distribution of latitudes and speeds of coronal mass ejections in the northern and southern hemispheres in cycle 23.JOURNAL OF ASTROPHYSICS AND ASTRONOMY,28(4),207-215.
MLA Gao PX,et al."Distribution of latitudes and speeds of coronal mass ejections in the northern and southern hemispheres in cycle 23".JOURNAL OF ASTROPHYSICS AND ASTRONOMY 28.4(2007):207-215.
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