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| Titel |
Modelling the magnetic field in Mercury’s magnetosheath |
| VerfasserIn |
David Parunakian, Sergey Dyadechkin, Igor Alexeev, Elena Belenkaya, Maxim Khodachenko, Esa Kallio, Markku Alho |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250128354
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| Publikation (Nr.) |
 EGU/EGU2016-8337.pdf |
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| Zusammenfassung |
| The main focus of the present work is to estimate the accuracy of the new assimilated model
(based on the paraboloid model of magnetosphere by Moscow State University
and the 3D hybrid model by Aalto University) for Mercury’s magnetic field in the
magnetosheath by comparing its predictions with MESSENGER magnetometer
measurements along several typical orbits. The duration of each magnetosheath pass is
approximately one hour for dawn-dusk orbits, which is substantially longer than
characteristic times of inner magnetospheric processes as well as the time required
for solar wind to flow past Mercury’s magnetosphere (approximately 1 min for
L ∼ 10RM).
Because of that, we need to carefully select the orbits to use from the available array of
over 8000 magnetosheath crossings to satisfy the necessary condition of similar solar wind
properties in orbit segments incoming and outgoing the magnetosheath.
We pay special attention to the differences in the Mercury-solar wind interactions for
southward and northward IMF. Dependence of reconnection phenomena on the
IMF Bz direction is clearly demonstrated by our assimilated hybrid and paraboloid
model simulation runs. We also examine the magnetosheath plasma parameters for
signatures of a plasma depletion layer and examine the properties of Mercury’s
magnetopause. |
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