Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei

Detalhes bibliográficos
Autor(a) principal: Abraham, J.
Data de Publicação: 2008
Outros Autores: Abreu, P., Aglietta, M., Aguirre, C., Allard, D., Allekotte, I., Pepe, Iuri Muniz
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/6258
Resumo: Acesso restrito: Texto completo. p. 188-204
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spelling Abraham, J.Abreu, P.Aglietta, M.Aguirre, C.Allard, D.Allekotte, I.Pepe, Iuri MunizAbraham, J.Abreu, P.Aglietta, M.Aguirre, C.Allard, D.Allekotte, I.Pepe, Iuri Muniz2012-06-29T13:40:25Z20080927-6505http://www.repositorio.ufba.br/ri/handle/ri/6258v. 29, n. 3Acesso restrito: Texto completo. p. 188-204Data collected by the Pierre Auger Observatory provide evidence for anisotropy in the arrival directions of the cosmic rays with the highest-energies, which are correlated with the positions of relatively nearby active galactic nuclei (AGN) [Pierre Auger Collaboration,Science 318 (2007) 938]. The correlation has maximum significance for cosmic rays with energy greater than 6 1019 eV and AGN at a distance less than 75 Mpc. We have confirmed the anisotropy at a confidence level of more than 99% through a test with parameters specified a priori, using an independent data set. The observed correlation is compatible with the hypothesis that cosmic rays with the highest-energies originate from extra-galactic sources close enough so that their flux is not significantly attenuated by interaction with the cosmic background radiation (the Greisen–Zatsepin–Kuz’min effect). The angular scale of the correlation observed is a few degrees, which suggests a predominantly light composition unless the magnetic fields are very weak outside the thin disk of our galaxy. Our present data do not identify AGN as the sources of cosmic rays unambiguously, and other candidate sources which are distributed as nearby AGN are not ruled out. We discuss the prospect of unequivocal identification of individual sources of the highest-energy cosmic rays within a few years of continued operation of the Pierre Auger Observatory.2008 Elsevier B.V. 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dc.title.pt_BR.fl_str_mv Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
dc.title.alternative.pt_BR.fl_str_mv ASTROPARTICLE PHYSICS
title Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
spellingShingle Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
Abraham, J.
High energy cosmic rays
UHECR
AGN
Anisotropy
Extra-galactic
Auger
Observatory
GZK
GMF
EGMF
title_short Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
title_full Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
title_fullStr Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
title_full_unstemmed Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
title_sort Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
author Abraham, J.
author_facet Abraham, J.
Abreu, P.
Aglietta, M.
Aguirre, C.
Allard, D.
Allekotte, I.
Pepe, Iuri Muniz
author_role author
author2 Abreu, P.
Aglietta, M.
Aguirre, C.
Allard, D.
Allekotte, I.
Pepe, Iuri Muniz
author2_role author
author
author
author
author
author
dc.contributor.author.fl_str_mv Abraham, J.
Abreu, P.
Aglietta, M.
Aguirre, C.
Allard, D.
Allekotte, I.
Pepe, Iuri Muniz
Abraham, J.
Abreu, P.
Aglietta, M.
Aguirre, C.
Allard, D.
Allekotte, I.
Pepe, Iuri Muniz
dc.subject.por.fl_str_mv High energy cosmic rays
UHECR
AGN
Anisotropy
Extra-galactic
Auger
Observatory
GZK
GMF
EGMF
topic High energy cosmic rays
UHECR
AGN
Anisotropy
Extra-galactic
Auger
Observatory
GZK
GMF
EGMF
description Acesso restrito: Texto completo. p. 188-204
publishDate 2008
dc.date.issued.fl_str_mv 2008
dc.date.accessioned.fl_str_mv 2012-06-29T13:40:25Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/6258
dc.identifier.issn.none.fl_str_mv 0927-6505
dc.identifier.number.pt_BR.fl_str_mv v. 29, n. 3
identifier_str_mv 0927-6505
v. 29, n. 3
url http://www.repositorio.ufba.br/ri/handle/ri/6258
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1016/j.astropartphys.2008.01.002
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
instacron:UFBA
instname_str Universidade Federal da Bahia (UFBA)
instacron_str UFBA
institution UFBA
reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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