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| Titel |
3D hybrid simulation of the interaction of a magnetic cloud with a bow shock |
| VerfasserIn |
Lucile Turc, Dominique Fontaine, Philippe Savoini, Ronan Modolo |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250091862
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| Publikation (Nr.) |
 EGU/EGU2014-6176.pdf |
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| Zusammenfassung |
| Magnetic clouds (MCs) are a subset of coronal mass ejections which are known for their
importance in driving geomagnetic storms. Studies based on both observations and modelling
have shown that the structure of an MC downstream of Earth’s bow shock strongly depends
on the encountered shock configuration. In order to complement these initial works, we use
3D hybrid simulations (i.e. ions dynamics are fully described and electrons are a massless
fluid) to model the interaction of an MC with a planetary bow shock. These global
simulations allow to generate a bow shock where full curvature effects are self-consistently
included in a supercritical regime (MA ≥ 5) as observed in front of a magnetic obstacle.
Then, an MC modelled by a flux rope (Burlaga et al., 1988) is injected upstream and
propagates towards this shock. We investigate the interaction of the MC with the bow shock,
and in particular the impact on the MC’s structure of the different domains of the shock wave
from the quasi-perpendicular to the quasi-parallel (and its associated ion foreshock region).
We use virtual spacecraft to probe the magnetosheath and compare their outputs to real
spacecraft data. |
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