IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Large scale distribution of arrival directions of cosmic rays detected above 10^18 eV at the Pierre Auger observatory
Autor/es:
PIERRE AUGER COLLABORATION (J. ABRAHAM, ... , A. MARIAZZI, ET AL)
Revista:
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2012 vol. 203 p. 34 - 81
ISSN:
0067-0049
Resumen:
A thorough search for large-scale anisotropies in the distribution of arrival directions of cosmic rays detected above 1018 eV
at the Pierre Auger Observatory is presented. This search is performed
as a function of both declination and right ascension in several energy
ranges above 1018 eV, and reported in terms of dipolar and
quadrupolar coefficients. Within the systematic uncertainties, no
significant deviation from isotropy is revealed. Assuming that any
cosmic-ray anisotropy is dominated by dipole and quadrupole moments in
this energy range, upper limits on their amplitudes are derived. These
upper limits allow us to test the origin of cosmic rays above 1018 eV
from stationary Galactic sources densely distributed in the Galactic
disk and predominantly emitting light particles in all directions.