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On the role of galactic magnetic halo in the ultra high energy cosmic rays propagation
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On the role of galactic magnetic halo in the ultra high energy cosmic rays propagation
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Paper
On the role of galactic magnetic halo in the ultra high energy cosmic rays propagation
2006
Overview
The study of propagation of Ultra High Energy Cosmic Rays (UHECR) is a key step in order to unveil the secret of their origin. Up to now it was considered only the influence of the galactic and the extragalactic magnetic fields. In this article we focus our analysis on the influence of the magnetic field of the galaxies standing between possible UHECR sources and us. Our main approach is to start from the well known galaxy distribution up to 120 Mpc. We use the most complete galaxy catalog: the LEDA catalog. Inside a sphere of 120 Mpc around us, we extract 60130 galaxies with known position. In our simulations we assign a Halo Dipole magnetic Field (HDF) to each galaxy. The code developed is able to retro-propagate a charged particle from the arrival points of UHECR data across our galaxies sample. We present simulations in case of Virgo cluster and show that there is a non negligible deviation in the case of protons of \\(7 \\times 10^{19}\\) eV, even if the \\(B\\) value is conservative. Then special attention is devoted to the AGASA triplet where we find that NGC3998 and NGC3992 could be possible candidates as sources.
Publisher
Cornell University Library, arXiv.org
