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| HAL : in2p3-00172416, version 1 |
| arXiv : 0709.1541 |
| DOI : 10.1051/0004-6361:20078653 |
| Fiche détaillée |  Récupérer au format |
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| Astronomy and Astrophysics 479 (2008) 97-110 |
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| Propagation of high-energy cosmic rays in extragalactic turbulent magnetic fields: resulting energy spectrum and composition |
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| N. Globus1D. Allard1E. Parizot1 |
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| (2008) |
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| We extend previous studies of mixed-composition extragalactic cosmic-ray source models, by investigating the influence of a non-negligible extragalactic magnetic field on the propagated cosmic-ray spectrum and composition. We study the transport of charged particles in turbulent fields and the transition from a ballistic to a diffusive propagation regime. We introduce a method allowing a fast integration of the particle trajectories, which allows us to calculate extragalactic cosmic-ray spectra in the general case, without using either the diffusive or the rectilinear approximation. We find that the main features of the mixed-composition models -- regarding the interpretation of the ankle and the non-monotonous evolution of the average cosmic-ray mass -- remain essentially unchanged as long as the magnetic field intensity does not exceed a few nG. |
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| 1 : | APC - AstroParticule et Cosmologie |
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| APC - AHE |
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| Thème(s) | : | Physique/Astrophysique/Cosmologie et astrophysique extra-galactique Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique Planète et Univers/Astrophysique |
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| Lien vers le texte intégral : |
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| http://fr.arXiv.org/abs/0709.1541 |
| in2p3-00172416, version 1 | |
| http://hal.in2p3.fr/in2p3-00172416 | |
| oai:hal.in2p3.fr:in2p3-00172416 | |
| Contributeur : Simone Lantz | |
| Soumis le : Lundi 17 Septembre 2007, 10:11:53 | |
| Dernière modification le : Vendredi 22 Juin 2012, 21:53:23 | |
