Using spherical wavelets to search for magnetically-induced alignment in the arrival directions of ultra-high energy cosmic rays
arXiv:1305.0523 · doi:10.1016/j.astropartphys.2013.11.001
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.
8 pages, 8 figures. Matches the published version
References in corpus (12)
- A New Model of the Galactic Magnetic Field
- Radio observational constraints on Galactic 3D-emission models
- Exact reconstruction with directional wavelets on the sphere
- The Mexican Hat Wavelet Family. Application to point source detection in CMB maps
- CRPropa 2.0 -- a Public Framework for Propagating High Energy Nuclei, Secondary Gamma Rays and Neutrinos
- A high-significance detection of non-Gaussianity in the WMAP 5-year data using directional spherical wavelets
- Propagation of UHE Protons through Magnetized Cosmic Web
- Cosmological applications of a wavelet analysis on the sphere
- Probing dark energy with steerable wavelets through correlation of WMAP and NVSS local morphological measures
- Search for signatures of magnetically-induced alignment in the arrival directions measured by the Pierre Auger Observatory
- Detecting filaments in the ultra-high energy cosmic ray distribution
- Detection of Point Sources in Cosmic Ray Maps using the Mexican Hat Wavelet Family