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Propagation of Ultrahigh Energy Nuclei in the Magnetic Field of our Galaxy
Giacinti G., Kachelrieß M., Semikoz D.V., Sigl G.
Dans Proceedings of the 32nd International Cosmic Ray Conference - 32nd International Cosmic Ray Conference, Beijing : Chine (2011) - http://hal.archives-ouvertes.fr/hal-00713456
Physique/Astrophysique/Phénomènes cosmiques de haute energie
Planète et Univers/Astrophysique/Phénomènes cosmiques de haute energie
Propagation of Ultrahigh Energy Nuclei in the Magnetic Field of our Galaxy
Gwenael Giacinti1, M. Kachelrieß2, D.V. Semikoz1, G. Sigl3
1 :  APC - UMR 7164 - AstroParticule et Cosmologie
http://www.apc.univ-paris7.fr/
CNRS : UMR7164 – IN2P3 – Observatoire de Paris – Université Paris VII - Paris Diderot – CEA : DSM/IRFU
APC - UMR 7164, Université Paris Diderot, 10 rue Alice Domon et Léonie Duquet, case postale 7020, F-75205 Paris Cedex 13
France
2 :  NTNU - Institutt for fysikk, NTNU
Trondheim
Institutt for fysikk, NTNU, Trondheim
Norvège
3 :  ITP - Institut für Theoretische Physik
Universität Hamburg
Luruper Chaussee 149, D-22761
Allemagne
APC - THEORIE
In this work, we present detailed simulations for propagation of ultra-high energy (UHE) heavy nuclei, with E > 60 EeV, within recent Galactic Magnetic Field (GMF) models. We investigate the impacts of the regular and turbulent components of the GMF. We show that with UHE heavy nuclei, there is no one-to-one correspondence between the arrival directions of cosmic rays (CR) measured at Earth and the direction of their extragalactic sources. Sources can have several distorted images on the sky. We compute images of galaxy clusters and of the supergalactic plane in recent GMF models and show the challenges, and possibilities, of "UHECR astronomy" with heavy nuclei. Finally, we present a quantitative study of the impact of the GMF on the (de-)magnification of source fluxes, due to magnetic lensing effects. We find that for 60 EeV iron nuclei, sources located in up to about one fifth of the sky would have their fluxes so strongly demagnified that they would not be detectable at Earth, even by the next generation of UHECR experiments.
Anglais

Proceedings of the 32nd International Cosmic Ray Conference (ICRC2011)
Proceedings of the 32nd International Cosmic Ray Conference
internationale
Communications avec actes
01/01/2011
2
43

32nd International Cosmic Ray Conference
11/08/2011
18/08/2011
Beijing
Chine

Lien vers le texte intégral : 
http://fr.arXiv.org/abs/1108.0362