Large-scale distribution of arrival directions of cosmic rays detected above 10 18 eV at the Pierre Auger Observatory

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 re...

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Autor principal: Multitudinario:513
Formato: JOUR
Materias:
astroparticle physics
cosmic rays
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00670049_v203_n2_p_Multitudinario
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00670049_v203_n2_p_Multitudinario2023-10-03T14:53:09Z Large-scale distribution of arrival directions of cosmic rays detected above 10 18 eV at the Pierre Auger Observatory Multitudinario:513 astroparticle physics cosmic rays 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. © 2012. The American Astronomical Society. All rights reserved.. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00670049_v203_n2_p_Multitudinario
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic astroparticle physics
cosmic rays
spellingShingle astroparticle physics
cosmic rays
Multitudinario:513
Large-scale distribution of arrival directions of cosmic rays detected above 10 18 eV at the Pierre Auger Observatory
topic_facet astroparticle physics
cosmic rays
description 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. © 2012. The American Astronomical Society. All rights reserved..
format JOUR
author Multitudinario:513
author_facet Multitudinario:513
author_sort Multitudinario:513
title Large-scale distribution of arrival directions of cosmic rays detected above 10 18 eV at the Pierre Auger Observatory
title_short Large-scale distribution of arrival directions of cosmic rays detected above 10 18 eV at the Pierre Auger Observatory
title_full Large-scale distribution of arrival directions of cosmic rays detected above 10 18 eV at the Pierre Auger Observatory
title_fullStr Large-scale distribution of arrival directions of cosmic rays detected above 10 18 eV at the Pierre Auger Observatory
title_full_unstemmed Large-scale distribution of arrival directions of cosmic rays detected above 10 18 eV at the Pierre Auger Observatory
title_sort large-scale distribution of arrival directions of cosmic rays detected above 10 18 ev at the pierre auger observatory
url http://hdl.handle.net/20.500.12110/paper_00670049_v203_n2_p_Multitudinario
work_keys_str_mv AT multitudinario513 largescaledistributionofarrivaldirectionsofcosmicraysdetectedabove1018evatthepierreaugerobservatory
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