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Accueil > Séminaires et conférences > Séminaires, soutenances de thèses et HDR précédents > 2010 > Séminaires 2010 > Le mardi 2 novembre à 11h

Le mardi 2 novembre à 11h

Claire Foullon (Université de Warwick)

Advances on the Multi-spacecraft Studies of Interplanetary Structures and Transients

Le mardi 2 novembre à 11h à Palaiseau (amphi Pierre Curie).

Multi-spacecraft studies in the solar wind contribute to the understanding of the macroscopic structure, evolution and dynamics of the solar corona and heliosphere. The recent good spatial coverage provided in-situ by spacecraft such as STEREO, ACE, Wind and Ulysses, has allowed the identification of magnetic cloud structures on their outskirts and the tracking of small-scale transients along the Sun-Earth line. Additional cross-scale coverage provided by Cluster in the near-Earth solar wind gives a more elaborate picture : the new insight into the substructure of those phenomena is used to infer properties at larger scales and to better understand their possible forms of interaction with the Earth’s magnetosphere. Differences between interplanetary and solar observations indicating large rotations of erupting filaments may point to the flux ropes being subject to the helical kink instability at the Sun. A useful marker to connect phenomena and in-situ observations is the heliospheric current sheet (HCS). Small-scale transients originating and being released from the base of the HCS or further out in the inner heliosphere have been shown to give a layered structure appearance to the HCS and are envisaged to account for large-scale HCS deformations.

Tutelles : CNRS Ecole Polytechnique Sorbonne Université Université Paris Sud Observatoire de Paris Convention : CEA
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