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| Titel |
Effects of MHD slow shocks propagating along magnetic flux tubes in a dipole magnetic field |
| VerfasserIn |
N. V. Erkaev, V. A. Shaidurov, V. S. Semenov, H. K. Biernat |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 9, no. 2 ; Nr. 9, no. 2, S.163-172 |
| Datensatznummer |
250006698
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| Publikation (Nr.) |
 copernicus.org/npg-9-163-2002.pdf |
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| Zusammenfassung |
| Variations of the
plasma pressure in a magnetic flux tube can produce MHD waves evolving
into shocks. In the case of a low plasma beta, plasma pressure pulses in
the magnetic flux tube generate MHD slow shocks propagating along the
tube. For converging magnetic field lines, such as in a dipole magnetic
field, the cross section of the magnetic flux tube decreases enormously
with increasing magnetic field strength. In such a case, the propagation
of MHD waves along magnetic flux tubes is rather different from that in
the case of uniform magnetic fields. In this paper, the propagation of MHD
slow shocks is studied numerically using the ideal MHD equations in an
approximation suitable for a thin magnetic flux tube with a low plasma
beta. The results obtained in the numerical study show that the jumps in
the plasma parameters at the MHD slow shock increase greatly while the
shock is propagating in the narrowing magnetic flux tube. The results are
applied to the case of the interaction between Jupiter and its satellite
Io, the latter being considered as a source of plasma pressure pulses. |
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