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Institut de recherche en astrophysique et planétologie |  |
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Institut de recherche en astrophysique et planétologie | |
| HAL : insu-00361561, version 1 |
| Fiche détaillée |  Récupérer au format |
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| 37th COSPAR Scientific Assembly, Montréal : Canada (2008) |
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| Signature of double reconnection in the mid-altitude cusp |
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| Frederic Pitout 1P. Escoubet 2 |
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| (13/07/2008) |
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| On some occasions, Cluster data in the mid-altitude cusp reveal overlapping ion populations under Northward IMF. While the poleward part of the cusp exhibits the expected reverse dispersion due to lobe reconnection, its equatorward part shows a second high-energy ion population that coexists with the low energy tail of the dispersion. This second populations is either dispersionless or slightly dispersed with energies increasing with increasing at high latitudes, indicative of lobe reconnection as well. Our analysis reveals that the second population comes from the opposite hemisphere and is very likely on closed field lines. We interpret this overlap of cusp populations in terms of double magnetic reconnection leading to newly closed magnetic field line in the dayside. |
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| 1 : | Laboratoire de Planétologie de Grenoble (LPG) |
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CNRS : UMR5109 – OSUG – INSU – Université Joseph Fourier - Grenoble I |
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| 2 : | ESA European Space Agency, ESTEC |
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ESA ESTEC |
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| 3 : | Centre d'étude spatiale des rayonnements (CESR) |
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CNRS : UMR5187 – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III |
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| insu-00361561, version 1 | |
| http://hal-insu.archives-ouvertes.fr/insu-00361561 | |
| oai:hal-insu.archives-ouvertes.fr:insu-00361561 | |
| Contributeur : Béatrice Pibaret-Bourdon | |
| Soumis le : Lundi 16 Février 2009, 10:45:44 | |
| Dernière modification le : Lundi 16 Février 2009, 10:45:44 | |
