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| Titel |
3-D mesoscale MHD simulations of magnetospheric cusp-like configurations: cusp diamagnetic cavities and boundary structure |
| VerfasserIn |
E. Adamson, A. Otto, K. Nykyri |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 30, no. 2 ; Nr. 30, no. 2 (2012-02-08), S.325-341 |
| Datensatznummer |
250017182
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| Publikation (Nr.) |
 copernicus.org/angeo-30-325-2012.pdf |
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| Zusammenfassung |
| We present results from mesoscale simulations of the magnetospheric cusp
region for both strongly northward and strongly southward interplanetary
magnetic field (IMF). Simulation results indicate an extended region of
depressed magnetic field and strongly enhanced plasma β which exhibits a
strong dependence on IMF orientation. These structures correspond to
the Cusp Diamagnetic Cavities (CDC's). The typical features of these CDC's are
generally well reproduced by the simulation. The inner boundaries between the
CDC and the magnetosphere are gradual transitions which form a clear funnel
shape, regardless of IMF orientation. The outer CDC/magnetosheath boundary
exhibits a clear indentation in both the x-z and y-z planes for
southward IMF, while it is only indented in the x-z plane for northward,
with a convex geometry in the y-z plane. The outer boundary represents an
Alfvénic transition, mostly consistent with a slow-shock, indicating that
reconnection plays an important role in structuring the high-altitude cusp
region. |
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