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| HAL : hal-00177684, version 1 |
| arXiv : 0710.1939 |
| DOI : 10.1111/j.1365-2966.2007.12511.x |
| Fiche détaillée |  Récupérer au format |
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| Monthly Notices of the Royal Astronomical Society 383 (2008) 41 |
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| MARCOS, a numerical tool for the simulation of multiple time-dependent non-linear diffusive shock acceleration |
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Gilles Ferrand 1Turlough Downes 2 |
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| (01/01/2008) |
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| We present a new code aimed at the simulation of diffusive shock acceleration (DSA), and discuss various test cases which demonstrate its ability to study DSA in its full time-dependent and non-linear developments. We present the numerical methods implemented, coupling the hydrodynamical evolution of a parallel shock (in one space dimension) and the kinetic transport of the cosmic-rays (CR) distribution function (in one momentum dimension), as first done by Falle. Following Kang and Jones and collaborators, we show how the adaptive mesh refinement technique (AMR) greatly helps accommodating the extremely demanding numerical resolution requirements of realistic (Bohm-like) CR diffusion coefficients. We also present the paral lelization of the code, which allows us to run many successive shocks at the cost of a single shock, and thus to present the first direct numerical simulations of linear and non-linear multiple DSA, a mechanism of interest in various astrophysical environments such as superbubbles, galaxy clusters and early cosmological flows. |
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| 1 : | Centre d'étude spatiale des rayonnements (CESR) |
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CNRS : UMR5187 – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III |
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| 2 : | School of Mathematical Science |
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Dublin City University |
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| 3 : | Laboratoire de Physique Théorique et Astroparticules (LPTA) |
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CNRS : UMR5207 – IN2P3 – Université Montpellier II - Sciences et techniques |
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| Domaine | : | Physique/Astrophysique/Cosmologie et astrophysique extra-galactique |
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| cosmic-rays – acceleration of particles – numerical simulations |
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| Lien vers le texte intégral : |
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| http://fr.arXiv.org/abs/0710.1939 |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| hal-00177684, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00177684 | |
| oai:hal.archives-ouvertes.fr:hal-00177684 | |
| Contributeur : Gilles Ferrand | |
| Soumis le : Lundi 8 Octobre 2007, 19:40:06 | |
| Dernière modification le : Lundi 12 Avril 2010, 14:04:57 | |
