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Les cornets polaires: étude d'une région clef de l'interface vent solaire-magnétosphère à l'aide des données Cluster.

Abstract : The direct access to ionosphere offered by the polar cusps to the solar wind plasma makes it a key region to study the solar wind / magnetosphere interface. It has been chosen to study the nature of the UBF waves and their interactions with the plasma in the most distant part of the polar cusp which the Cluster II data.
The detailed study of an event shows that the injections of solar wind plasma are detected in simultaneity with strong electromagnetic UBF activity. The wave analyses highlight the alfvénic nature of the fluctuations and the mixing of various modes inside a single wave burst. That result is achievable only with a multi-satellite analysis, in this case the k- filtering technique. These results are generalized, showing the importance of the UBF waves in the solar wind plasma penetration into the magnetosphere.
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https://tel.archives-ouvertes.fr/tel-00126368
Contributor : Benjamin Grison <>
Submitted on : Wednesday, January 24, 2007 - 6:47:54 PM
Last modification on : Wednesday, December 9, 2020 - 3:08:55 PM
Long-term archiving on: : Friday, September 21, 2012 - 10:35:10 AM

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  • HAL Id : tel-00126368, version 1

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Benjamin Grison. Les cornets polaires: étude d'une région clef de l'interface vent solaire-magnétosphère à l'aide des données Cluster.. Astrophysique [astro-ph]. Université Pierre et Marie Curie - Paris VI, 2006. Français. ⟨tel-00126368⟩

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