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

Author(s)

Zimbres, M. ^[1] ; Batista, R. Alves ^[2] ; Kemp, E. ^[1]

Affiliation

^[1] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP - Brazil

^[2] Univ Hamburg, Inst Theoret Phys 2, D-22761 Hamburg - Germany

• Document type: Journal article
• Source: Astroparticle Physics; v. 54, p. 54-60, FEB 2014.
• Web of Science Citations: 5

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. (C) 2013 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 10/04743-0 - Use of multiplets to the study of the galactic magnetic field
• Grantee: Rafael Alves Batista
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 08/04259-0 - High energy cosmic rays
• Grantee: Luiz Vitor de Souza Filho
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 10/07359-6 - Study of cosmic rays of highest energies with the Pierre Auger Observatory
• Grantee: Carola Dobrigkeit Chinellato
• Support Opportunities: Research Projects - Thematic Grants