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The Large-Scale Source Regions of Coronal Mass Ejections

Published online by Cambridge University Press:  03 June 2005

Guiping Zhou ,
Jingxiu Wang ,
Jun Zhang  and
Chijie Xiao
Guiping Zhou
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: zhougp@ourstar.bao.ac.cn
Jingxiu Wang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: zhougp@ourstar.bao.ac.cn
Jun Zhang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: zhougp@ourstar.bao.ac.cn
Chijie Xiao
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: zhougp@ourstar.bao.ac.cn
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Abstract

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Using the observations of LASCO aboard SOHO in the interval from Mar. 1997 to Dec. 2003, 301 earth-directed halo CMEs are selected and the source regions are located in MDI synoptic charts. A statistical analysis has been made with the emphasis on the CMEs' large-scale source regions as well as the correlation between CMEs and solar surface activity. The statistics show that CMEs are intrinsically related to surface activity. Four groups of CMEs' large-scale source structures are identified on the photosphere. They are: I, Extended bipole regions (EBRs) with long magnetic neutral line; II, Closely packed active regions (ARs); III, Large-scale magnetic flux of the same polarity runs through the opposite hemisphere, along the boundary there appears transequatorial filaments; IV, Between two EBRs with long filament. The result shows that CME-associated source activity is closely related to the types of large-scale magnetic structures.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Keywords

Sun: coronal mass ejections (CMEs)Sun: activitySun: magnetic fields
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS226 , September 2004 , pp. 200 - 205
Copyright
© 2005 International Astronomical Union