Constraints on the origin of cosmic rays above 1018 eV from large scale anisotropy searches in data of the Pierre Auger Observatory
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Constraints on the origin of cosmic rays above 1018 eV from large scale anisotropy searches in data of the Pierre Auger Observatory

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Constraints on the origin of cosmic rays above 1018 eV from large scale anisotropy searches in data of the Pierre Auger Observatory

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The Pierre Auger Collaboration; Arqueros Martínez, Fernando; Gascón Bravo, Alberto; Pastor Carpi, Sergio; Rosado Vélez, Jaime; Vázquez Peñas, José Ramón; Zamorano García, Bruno
Aquest document és un/a article, creat/da en: 2013

Este documento está disponible también en : http://dx.doi.org/10.1088/2041-8205/762/1/L13
A thorough search for large-scale anisotropies in the distribution of arrival directions of cosmic rays detected above 10 eV at the Pierre Auger Observatory is reported. For the first time, these large-scale anisotropy searches are performed as a function of both the right ascension and the declination and expressed in terms of dipole and quadrupole moments. Within the systematic uncertainties, no significant deviation from isotropy is revealed. Upper limits on dipole and quadrupole amplitudes are derived under the hypothesis that any cosmic ray anisotropy is dominated by such moments in this energy range. These upper limits provide constraints on the production of cosmic rays above 10 eV, since they allow us to challenge an origin from stationary galactic sources densely distributed in the galactic disk and emitting predominantly light particles in all directions.

    Pastor Carpi, Sergio Arqueros Martinez, Fernando Gascón Bravo, Alberto Rosado Velez, Jaime Vázquez Peñas, José Ramón Zamorano García, Bruno 2013 Constraints on the origin of cosmic rays above 1018 eV from large scale anisotropy searches in data of the Pierre Auger Observatory Astrophysical Journal Letters 762 L13-1 L13-8
http://dx.doi.org/10.1088/2041-8205/762/1/L13
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