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Abstract:

We present a detailed study of the large-scale anisotropies of cosmic rays with energies above 4 EeV measured using the Pierre Auger Observatory. For the energy bins [4, 8] EeV and E ≥ 8 EeV, the most significant signal is a dipolar modulation in R.A. at energies above 8 EeV, as previously reported. In this paper we further scrutinize the highest-energy bin by splitting it into three energy ranges. We find that the amplitude of the dipole increases with energy above 4 EeV. The growth can be fitted with a power law with index β = 0.79 ± 0.19. The directions of the dipoles are consistent with an extragalactic origin of these anisotropies at all the energies considered. Additionally, we have estimated the quadrupolar components of the anisotropy: they are not statistically significant. We discuss the results in the context of the predictions from different models for the distribution of ultrahigh-energy sources and cosmic magnetic fields. © 2018. The American Astronomical Society. All rights reserved..

Registro:

Documento: Artículo
Título:Large-scale Cosmic-Ray Anisotropies above 4 EeV Measured by the Pierre Auger Observatory
Autor:Aab, A. et al.
Este artículo contiene 376 autores, consultelos en el artículo en formato pdf.
Filiación: Este artículo contiene 376 autores con sus filiaciones, consultelas en el artículo en formato pdf.
Palabras clave:astroparticle physics; cosmic rays
Año:2018
Volumen:868
Número:1
DOI: http://dx.doi.org/10.3847/1538-4357/aae689
Título revista:Astrophysical Journal
Título revista abreviado:Astrophys. J.
ISSN:0004637X
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v868_n1_p_Aab

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Citas:

---------- APA ----------
(2018) . Large-scale Cosmic-Ray Anisotropies above 4 EeV Measured by the Pierre Auger Observatory. Astrophysical Journal, 868(1).
http://dx.doi.org/10.3847/1538-4357/aae689
---------- CHICAGO ----------
Aab, A. "Large-scale Cosmic-Ray Anisotropies above 4 EeV Measured by the Pierre Auger Observatory" . Astrophysical Journal 868, no. 1 (2018).
http://dx.doi.org/10.3847/1538-4357/aae689
---------- MLA ----------
Aab, A. "Large-scale Cosmic-Ray Anisotropies above 4 EeV Measured by the Pierre Auger Observatory" . Astrophysical Journal, vol. 868, no. 1, 2018.
http://dx.doi.org/10.3847/1538-4357/aae689
---------- VANCOUVER ----------
Aab, A. Large-scale Cosmic-Ray Anisotropies above 4 EeV Measured by the Pierre Auger Observatory. Astrophys. J. 2018;868(1).
http://dx.doi.org/10.3847/1538-4357/aae689