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| Titel |
MHD flows at astropauses and in astrotails |
| VerfasserIn |
D. H. Nickeler, T. Wiegelmann, M. Karlický, M. Kraus |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
2199-3955
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| Digitales Dokument |
URL |
| Erschienen |
In: ASTRA Proceedings ; 1, no. 1 ; Nr. 1, no. 1 (2014-09-05), S.51-60 |
| Datensatznummer |
250115111
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| Publikation (Nr.) |
 copernicus.org/ap-1-51-2014.pdf |
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| Zusammenfassung |
| The geometrical shapes and the physical properties of stellar wind –
interstellar medium interaction regions form an important stage for studying
stellar winds and their embedded magnetic fields as well as cosmic ray
modulation. Our goal is to provide a proper representation and classification
of counter-flow configurations and counter-flow interfaces in the frame of
fluid theory. In addition we calculate flows and large-scale electromagnetic
fields based on which the large-scale dynamics and its role as possible
background for particle acceleration, e.g., in the form of anomalous cosmic
rays, can be studied. We find that for the definition of the boundaries,
which are determining the astropause shape, the number and location of
magnetic null points and stagnation points is essential. Multiple
separatrices can exist, forming a highly complex environment for the
interstellar and stellar plasma. Furthermore, the formation of extended tail
structures occur naturally, and their stretched field and streamlines provide
surroundings and mechanisms for the acceleration of particles by
field-aligned electric fields. |
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