In:
The Astrophysical Journal Supplement Series, American Astronomical Society, Vol. 203, No. 2 ( 2012-12-01), p. 34-
Abstract:
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 presented. This search is performed as a function of both declination and right ascension in several energy ranges above 10 18 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
10 18 eV from stationary Galactic sources densely distributed in
the Galactic disk and predominantly emitting light particles in all directions.
Type of Medium:
Online Resource
ISSN:
0067-0049
,
1538-4365
DOI:
10.1088/0067-0049/203/2/34
Language:
Unknown
Publisher:
American Astronomical Society
Publication Date:
2012
detail.hit.zdb_id:
2006860-8
detail.hit.zdb_id:
2207650-5
SSG:
16,12
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