INVESTIGADORES
TUEROS Matias Jorge
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 (AUTOR 434 DE 474); M. TUEROS
Revista:
ASTROPHYSICAL JOURNAL
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2012 vol. 762 p. 13 - 29
ISSN:
0004-637X
Resumen:
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.