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Interaction Between CME and Magnetosphere Observed by Cluster on Nov. 6, 2001: (1) Waves Excitation

Published online by Cambridge University Press:  01 November 2006

C. J. Xiao ,
L. T. Song ,
Z. Y. Pu ,
J. X. Wang ,
Z. X. Liu ,
K.-H. Glassmeier ,
A. Balogh  and
H. Reme
C. J. Xiao
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: [email protected]
L. T. Song
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: [email protected] Institute of Space Physics and Applied Technology, Peking University, Beijing 100871, China
Z. Y. Pu
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: [email protected] Institute of Space Physics and Applied Technology, Peking University, Beijing 100871, China
J. X. Wang
Affiliation:
National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: [email protected]
Z. X. Liu
Affiliation:
CSSAR, Chinese Academy of Sciences, Beijing 100080, China
K.-H. Glassmeier
Affiliation:
IGEP, Technische Universität Braunschweig, Germany
A. Balogh
Affiliation:
Space and Atmospheric Physics Group, Imperial College, London, UK
H. Reme
Affiliation:
CESR, BP 4346, 31028 Toulouse cedex 4, France
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Abstract

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Very few in situ measurements so far show the details of the interactions between CME and magnetosphere. Here we report a fortuitous observation that the Cluster spacecraft were located at the dusk-side magnetopause, meandering back and forth four times between the ICME and the magnetosphere, and observed part process of the interaction between the CME and the magnetosphere. The primarily analysis showed that: (1) a fast ion beam other than the ambient plasma was observed almost perpendicular to the magnetic field; (2) The left-hand-polarized kinetic Alfvén waves excitation by the ion beam; and (3) the resonances between the kinetic Alfvén waves and part of the beam particles lead to the pitch angle diffusion of resonant particles and formating of a monospheric distribution with nearly constant kinetic energy. The wave-particle resonance may pay an important role in the energy transfer and particle exchange across the magnetopause between the magnetosheath and magnetosphere during the CME impulsion.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S233: Solar Activity and its Magnetic Origin , March 2006 , pp. 373 - 376
Copyright
© 2006 International Astronomical Union