INVESTIGADORES
MOLLERACH Maria Silvia
artículos
Título:
Large-scale Distribution of Arrival Directions of Cosmic Rays Detected Above 1018 eV at the Pierre Auger Observatory
Autor/es:
THE PIERRE AUGER COLLABORATION, INCLUYE S. MOLLERACH
Revista:
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2012 vol. 203 p. 34 - 40
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.