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≥6×10^19 eV by analyzing cosmic rays with energies above E≥5×10^18 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. 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.

Aab A., Abreu P., Aglietta M., Ahn E. J., Al Samarai I., Albuquerque I. F. M., et al. (2015). Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 75, 269-283 [10.1140/epjc/s10052-015-3471-0].

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

Buscemi M.;Marsella G.;
2015-01-01

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 E≥6×10^19 eV by analyzing cosmic rays with energies above E≥5×10^18 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. 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.
2015
Aab A., Abreu P., Aglietta M., Ahn E. J., Al Samarai I., Albuquerque I. F. M., et al. (2015). Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 75, 269-283 [10.1140/epjc/s10052-015-3471-0].
File in questo prodotto:
File Dimensione Formato  
Aab2015_Article_SearchForPatternsByCombiningCo.pdf

accesso aperto

Descrizione: Articolo
Tipologia: Versione Editoriale
Dimensione 1.26 MB
Formato Adobe PDF
1.26 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/466620
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 15
  • ???jsp.display-item.citation.isi??? 11
social impact