TY  - JOUR
AU  - Pierre Auger Collaboration (Abreu, P. et al
AU  - Pastor, S.
PY  - 2013
DA  - 2013//
TI  - Constraints on the origin of cosmic rays above 10^18 eV from large-scale anisotropy searches in data of the Pierre Auger Observatory
T2  - Astrophys. J. Lett.
JO  - Astrophysical Journal Letters
SP  - L13 - 8pp
VL  - 762
IS  - 1
PB  - Iop Publishing Ltd
KW  - astroparticle physics
KW  - cosmic rays
AB  - A thorough search for large-scale anisotropies in the distribution of arrival directions of cosmic rays detected above 10(18) 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(18) 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.
SN  - 2041-8205
UR  - http://arxiv.org/abs/arXiv:1212.3083
UR  - https://doi.org/10.1088/2041-8205/762/1/L13
DO  - 10.1088/2041-8205/762/1/L13
LA  - English
N1  - WOS:000312488400013
ID  - PierreAugerCollaborationAbreu+Pastor2013
ER  -