Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
- Autores
- Badagnani, Daniel Omar; Dova, María Teresa; Gómez Albarracín, Flavia Alejandra; Grunfeld, Christian Martín; Manceñido, Mónica E.; Mariazzi, Analisa Gabriela; Moreno, Juan Cruz; Sciutto, Sergio Juan; Veiga, Alejandro Luis; Wahlberg, Hernán Pablo; The Pierre Auger Collaboration
- Año de publicación
- 2008
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- 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.
Facultad de Ciencias Exactas - Materia
-
Ciencias Exactas
Física
Radiación cósmica
Anisotropía
Greisen–Zatsepin–Kuz’min effect
Pierre Auger Observatory - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/80614
Ver los metadatos del registro completo
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Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nucleiBadagnani, Daniel OmarDova, María TeresaGómez Albarracín, Flavia AlejandraGrunfeld, Christian MartínManceñido, Mónica E.Mariazzi, Analisa GabrielaMoreno, Juan CruzSciutto, Sergio JuanVeiga, Alejandro LuisWahlberg, Hernán PabloThe Pierre Auger CollaborationCiencias ExactasFísicaRadiación cósmicaAnisotropíaGreisen–Zatsepin–Kuz’min effectPierre Auger ObservatoryData 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 10<sup>19</sup> 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.Facultad de Ciencias Exactas2008-02-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf188-204http://sedici.unlp.edu.ar/handle/10915/80614enginfo:eu-repo/semantics/altIdentifier/issn/0927-6505info:eu-repo/semantics/altIdentifier/doi/10.1016/j.astropartphys.2008.01.002info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:14:52Zoai:sedici.unlp.edu.ar:10915/80614Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:14:52.678SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei |
| 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 Badagnani, Daniel Omar Ciencias Exactas Física Radiación cósmica Anisotropía Greisen–Zatsepin–Kuz’min effect Pierre Auger Observatory |
| 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 |
| dc.creator.none.fl_str_mv |
Badagnani, Daniel Omar Dova, María Teresa Gómez Albarracín, Flavia Alejandra Grunfeld, Christian Martín Manceñido, Mónica E. Mariazzi, Analisa Gabriela Moreno, Juan Cruz Sciutto, Sergio Juan Veiga, Alejandro Luis Wahlberg, Hernán Pablo The Pierre Auger Collaboration |
| author |
Badagnani, Daniel Omar |
| author_facet |
Badagnani, Daniel Omar Dova, María Teresa Gómez Albarracín, Flavia Alejandra Grunfeld, Christian Martín Manceñido, Mónica E. Mariazzi, Analisa Gabriela Moreno, Juan Cruz Sciutto, Sergio Juan Veiga, Alejandro Luis Wahlberg, Hernán Pablo The Pierre Auger Collaboration |
| author_role |
author |
| author2 |
Dova, María Teresa Gómez Albarracín, Flavia Alejandra Grunfeld, Christian Martín Manceñido, Mónica E. Mariazzi, Analisa Gabriela Moreno, Juan Cruz Sciutto, Sergio Juan Veiga, Alejandro Luis Wahlberg, Hernán Pablo The Pierre Auger Collaboration |
| author2_role |
author author author author author author author author author author |
| dc.subject.none.fl_str_mv |
Ciencias Exactas Física Radiación cósmica Anisotropía Greisen–Zatsepin–Kuz’min effect Pierre Auger Observatory |
| topic |
Ciencias Exactas Física Radiación cósmica Anisotropía Greisen–Zatsepin–Kuz’min effect Pierre Auger Observatory |
| dc.description.none.fl_txt_mv |
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 10<sup>19</sup> 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. Facultad de Ciencias Exactas |
| description |
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 10<sup>19</sup> 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. |
| publishDate |
2008 |
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2008-02-03 |
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info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Articulo http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
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article |
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publishedVersion |
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http://sedici.unlp.edu.ar/handle/10915/80614 |
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eng |
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