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arXiv · 1305.0523

Using spherical wavelets to search for magnetically-induced alignment in the arrival directions of ultra-high energy cosmic rays

M. Zimbres·R. Alves Batista·E. Kemp
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Abstract

Due to the action of the intervening cosmic magnetic fields, ultra-high energy cosmic rays (UHECRs) can be deflected in such a way as to create clustered energy-ordered filamentary structures in the arrival direction of these particles, the so-called multiplets. In this work we propose a new method based on the spherical wavelet transform to identify multiplets in sky maps containing arrival directions of UHECRs. The method is illustrated in simulations with a multiplet embedded in isotropic backgrounds with different numbers of events. The efficiency of the algorithm is assessed through the calculation of Type I and II errors.

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M. Zimbres, R. Alves Batista, E. Kemp. 2013-05-02. Using spherical wavelets to search for magnetically-induced alignment in the arrival directions of ultra-high energy cosmic rays. https://doi.org/10.1016/j.astropartphys.2013.11.001

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