Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-10-31
JETP Lett. 79 (2004) 583-587; Pisma Zh.Eksp.Teor.Fiz. 79 (2004) 719-723
Astronomy and Astrophysics
Astrophysics
Replaced with the version accepted for publication in JETP Lett. Additional graphical material can be found here: http://dip
Scientific paper
10.1134/1.1790011
We construct a map of deflections of ultra-high energy cosmic rays by extragalactic magnetic fields using a magneto-hydrodynamical simulation of cosmic structure formation that realistically reproduces the positions of known galaxy clusters in the Local Universe. Large deflection angles occur in cluster regions, which however cover only an insignificant fraction of the sky. More typical deflections of order $\lsim 1^\circ$ are caused by crossings of filaments. For protons with energies $E \geq 4 \times 10^{19} {\rm eV}$, deflections do not exceed a few degrees over most of the sky up to a propagation distance of 500 Mpc. Given that the field strength of our simulated intergalactic magnetic field forms a plausible upper limit, we conclude that charged particle astronomy is in principle possible.
Dolag Klaus
Grasso Dario
Springel Volker
Tkachev Igor
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