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| Titel |
TeV Cosmic Ray Anisotropy and the Heliospheric Magnetic Field |
| VerfasserIn |
P. Desiati, A. Lazarian |
| 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 (2014-10-31), S.65-71 |
| Datensatznummer |
250115113
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| Publikation (Nr.) |
 copernicus.org/ap-1-65-2014.pdf |
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| Zusammenfassung |
| Cosmic rays are observed to possess a small non uniform distribution in arrival direction. Such anisotropy
appears to have a roughly consistent topology between tens of GeV and hundreds of TeV, with a
smooth energy dependency on phase and amplitude.
Above a few hundreds of TeV a sudden change in the topology of the anisotropy
is observed. The distribution of cosmic ray sources in the Milky Way is
expected to inject anisotropy on the cosmic ray flux. The nearest and most
recent sources, in particular, are expected to contribute more significantly
than others. Moreover the interstellar medium is expected to have different
characteristics throughout the Galaxy, with different turbulent properties
and injection scales. Propagation effects in the interstellar magnetic field
can shape the cosmic ray particle distribution as well. In particular, in the
1–10 TeV energy range, they have a gyroradius comparable to the size of the
Heliosphere, assuming a typical interstellar magnetic field strength of 3 μG.
Therefore they are expected to be strongly affected by the
Heliosphere in a manner ordered by the direction of the local interstellar
magnetic field and of the heliotail. In this paper we discuss on the
possibility that TeV cosmic rays arrival distribution might be significantly
redistributed as they propagate through the Heliosphere. |
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