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A Possible Explanation for the Different Mean Speeds of Halo and Limb CMEs

Published online by Cambridge University Press:  03 June 2005

J.X. Cheng ,
C.T. Yeh ,
D.M. Ding  and
P.F. Chen
J.X. Cheng
Affiliation:
Department of Astronomy, Nanjing University, Nanjing, 210093, China email: chengjianxia@nju.org.cn
C.T. Yeh
Affiliation:
Department of Astronomy, Nanjing University, Nanjing, 210093, China email: chengjianxia@nju.org.cn
D.M. Ding
Affiliation:
Department of Astronomy, Nanjing University, Nanjing, 210093, China email: chengjianxia@nju.org.cn
P.F. Chen
Affiliation:
Department of Astronomy, Nanjing University, Nanjing, 210093, China email: chengjianxia@nju.org.cn
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Abstract

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In order to explain the different average speeds between halo and limb CMEs, we investigate the relationship between the brightness and speed for 17 halo CMEs. It is found that faster CMEs tend to be brighter, which implies that many halo CMEs with slow speeds are missed in observation owing to the limited sensitivity of LASCO detectors or identifications. As a result, the statistical average speed of halo CMEs turns to be much larger than that of limb CMEs.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Keywords

Sun: coronal mass ejections (CMEs)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUS226 , September 2004 , pp. 112 - 113
Copyright
© 2005 International Astronomical Union