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dc.date.accessioned 2019-09-06T12:31:55Z
dc.date.available 2019-09-06T12:31:55Z
dc.date.issued 2008-02-03
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/80614
dc.description.abstract Data collected by the Pierre Auger Observatory provide evidence for anisotropy in the arrival directions of the cosmic rays with the ighest-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 x 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. en
dc.format.extent 188-204 es
dc.language en es
dc.subject Radiación cósmica es
dc.subject Anisotropía es
dc.subject Greisen–Zatsepin–Kuz’min effect es
dc.subject Pierre Auger Observatory es
dc.title Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei en
dc.type Articulo es
sedici.identifier.other https://doi.org/10.1016/j.astropartphys.2008.01.002 es
sedici.identifier.issn 0927-6505 es
sedici.creator.person Badagnani, Daniel Omar es
sedici.creator.person Dova, María Teresa es
sedici.creator.person Gómez Albarracín, Flavia Alejandra es
sedici.creator.person Grunfeld, Christian Martín es
sedici.creator.person Manceñido, Mónica E. es
sedici.creator.person Mariazzi, Analisa Gabriela es
sedici.creator.person Moreno, Juan Cruz es
sedici.creator.person Sciutto, Sergio Juan es
sedici.creator.person Veiga, Alejandro Luis es
sedici.creator.person Wahlberg, Hernán Pablo es
sedici.creator.person The Pierre Auger Collaboration es
sedici.subject.materias Ciencias Exactas es
sedici.subject.materias Física es
sedici.description.fulltext true es
mods.originInfo.place Facultad de Ciencias Exactas es
sedici.subtype Articulo es
sedici.rights.license Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
sedici.rights.uri http://creativecommons.org/licenses/by-nc-sa/4.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle Astroparticle Physics es
sedici.relation.journalVolumeAndIssue vol. 29, no. 3 es


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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) Except where otherwise noted, this item's license is described as Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)