Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory

Aab, Alexander

doi:10.1140/epjc/s10052-015-3471-0

Title: Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory

Journal Article · Sat Jun 20 00:00:00 EDT 2015 · European Physical Journal. C, Particles and Fields

DOI:https://doi.org/10.1140/epjc/s10052-015-3471-0· OSTI ID:1226294

Aab, Alexander ^[1]

Univ. Siegen, Siegen (Germany). et al.

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 E ≥ 6×10¹⁹ eV by analyzing cosmic rays with energies above E ≥ 5×10¹⁸ eV arriving within an angular separation of approximately 15°. 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. As a result, 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.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: Pierre Auger Collaboration

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 1226294

Report Number(s):: FERMILAB-PUB-14-384-AD-AE-CD-TD; arXiv eprint number arXiv:1410.0515

Journal Information:: European Physical Journal. C, Particles and Fields, Vol. 75; ISSN 1434-6044

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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