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| Titel |
Jump conditions for pressure anisotropy and comparison with the Earth's bow shock |
| VerfasserIn |
D. F. Vogl, H. K. Biernat, N. V. Erkaev, C. J. Farrugia, S. Mühlbachler |
| 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 ; 8, no. 3 ; Nr. 8, no. 3, S.167-174 |
| Datensatznummer |
250005518
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| Publikation (Nr.) |
 copernicus.org/npg-8-167-2001.pdf |
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| Zusammenfassung |
| Taking into account the pressure
anisotropy in the solar wind, we study the magnetic field and plasma
parameters downstream of a fast shock, as functions of upstream parameters
and downstream pressure anisotropy. In our theoretical approach, we model
two cases: a) the perpendicular shock and b) the oblique shock. We use two
threshold conditions of plasma instabilities as additional equations to
bound the range of pressure anisotropy. The criterion of the mirror
instability is used for pressure anisotropy p \perp /p\parrallel > 1.
Analogously, the criterion of the fire-hose instability is taken into
account for pressure anisotropy p \perp /p\parrallel < 1. We found that
the variations of the parallel pressure, the parallel temperature, and the
tangential component of the velocity are most sensitive to the pressure
anisotropy downstream of the shock. Finally, we compare our theory with
plasma and magnetic field parameters measured by the WIND spacecraft. |
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