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| Titel |
Thermodynamic MHD Simulation of the 2000 July 14 "Bastille Day" Eruption |
| VerfasserIn |
Tibor Torok, Cooper Downs, Roberto Lionello, Jon A. Linker, Viacheslav S. Titov, Zoran Mikic, Pete Riley |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250108198
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| Publikation (Nr.) |
 EGU/EGU2015-7941.pdf |
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| Zusammenfassung |
| The "Bastille Day" event that occurred on 2000 July 14 is one of the most
extensively studied solar eruptions. It originated in a complex active region
close to disk center and produced an X5.7 flare, a fast halo CME, and an
intense geomagnetic storm.
Accurate numerical simulations of such events, in particular the matching of
parameters relevant for space weather such as the CME velocity and magnetic
orientation, require a realistic model of the large-scale magnetic field and
plasma environment into which the eruption propagates and interacts, as well
as a modeling of the pre-eruptive configuration and eruption initiation that
are as realistic as possible.
Here we present an MHD simulation of the Bastille Day event that complies
with these requirements. We first produce a steady-state MHD solution of the
background corona that incorporates realistic energy transport ("thermodynamic
MHD"), photospheric magnetic field measurements, and the solar wind. In order
to model the pre-eruptive magnetic field, we then insert a
stable, elongated flux rope that resides above the highly curved polarity
inversion line of the active region. Finally, we produce the eruption by
imposing photospheric flows that slowly converge towards the polarity inversion
line. In this presentation we describe our method, compare the simulation
results with the observations, and discuss the challenges and limitations
involved in modeling such complex and powerful eruptions. |
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