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| Titel |
Hall magnetohydrodynamic effects for three-dimensional magnetic reconnection with finite width along the direction of the current |
| VerfasserIn |
Takuma Nakamura, Rumi Nakamura, Alexandra Alexandrova, Yasubumi Kubota |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250050080
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| Zusammenfassung |
| We have performed three-dimensional Hall magnetohydrodynamic (MHD) simulations of
magnetic reconnection with finite width along the current direction. Previous MHD
simulations have revealed that such localized three-dimensional situations produce
the so-called fast reconnection process, in which an Alfvenic fast and narrow jet
flows from the localized reconnection region, and the reconnected field lines are
strongly piled-up at the head of the jet. Our Hall MHD simulations also confirmed a
similar fast reconnection process. On the other hand, our Hall MHD simulations
also revealed that the Hall effects critically change the results obtained from MHD
simulations regarding the physics of the reconnection region; in the Hall MHD cases, the
reconnection region itself broadens and moves in the current and anti-current directions
due to the plasma flow related with the current. This means that the location and
the size of the reconnection region are unsteady features in Hall MHD regime. In
this presentation, we will show the detailed results of our Hall MHD simulations
and discuss their implications to the observations in the planetary magnetotail. |
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