INVESTIGADORES
MOLLERACH Maria Silvia
artículos
Título:
Constraints on the Origin of Cosmic Rays above 1018 eV from Large-scale Anisotropy Searches in Data of the Pierre Auger Observatory
Autor/es:
THE PIERRE AUGER COLLABORATION, INCLUYE S. MOLLERACH
Revista:
ASTROPHYSICAL JOURNAL
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2013 vol. 762 p. 13 - 20
ISSN:
0004-637X
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 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
1018 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.