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Type: Journal article
Title: Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory
Author: The Pierre Auger Collaboration
Aab, A.
Abreu, P.
Aglietta, M.
Ahn, E.
Samarai, I.
Albuquerque, I.
Allekotte, I.
Allen, J.
Allison, P.
Almela, A.
Castillo, J.
Alvarez-Muñiz, J.
Batista, R.
Ambrosio, M.
Aminaei, A.
Anchordoqui, L.
Andringa, S.
Aramo, C.
Aranda, V.
et al.
Citation: European Physical Journal C, 2015; 75(6):269-1-269-15
Publisher: Springer-Verlag
Issue Date: 2015
ISSN: 1434-6044
Statement of
The Pierre Auger Collaboration ... A. Aab ... K. B. Barber ... J. A. Bellido ... S. Blaess ... R.W.Clay ... M. J. Cooper ... B. R. Dawson ... T. D. Grubb ... T.A.Harrison ... A. E. Herve, G. C. Hill ... M. Malacari ... P. Nguyen ... S. J. Saffi ... F. Sarazin ... J. Sorokin ... P. van Bodegom ... et al.
Abstract: Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of the Pierre Auger Observatory. We investigate local regions around the highest-energy cosmic rays with [Formula: see text] eV by analyzing cosmic rays with energies above [Formula: see text] eV arriving within an angular separation of approximately 15[Formula: see text]. We characterize the energy distributions inside these regions by two independent methods, one searching for angular dependence of energy-energy correlations and one searching for collimation of energy along the local system of principal axes of the energy distribution. No significant patterns are found with this analysis. The comparison of these measurements with astrophysical scenarios can therefore be used to obtain constraints on related model parameters such as strength of cosmic-ray deflection and density of point sources.
Description: Published online: 20 June 2015
Rights: © The Author(s) 2015. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
RMID: 0030031197
DOI: 10.1140/epjc/s10052-015-3471-0
Appears in Collections:IPAS publications

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