Correlation of the highest energy cosmic rays with nearby extragalactic objects

Autor:	Badagnani, Daniel Omar, Dova, María Teresa, Epele, Luis Nicolás, Gómez Albarracín, Flavia Alejandra, Grunfeld, Christian Martín, Manceñido, Mónica E., Mariazzi, Analisa Gabriela, Moreno, Juan Cruz, Sciutto, Sergio Juan, Tueros, Matías Jorge, Veiga, Alejandro Luis, Wahlberg, Hernán Pablo, The Pierre Auger Collaboration
Jazyk:	angličtina
Rok vydání:	2007
Předmět:	Extragalactic sources Astrophysics::High Energy Astrophysical Phenomena Astrophysics::Instrumentation and Methods for Astrophysics Física Astrophysics::Cosmology and Extragalactic Astrophysics Cosmic rays Correlation
Popis:	Using data collected at the Pierre Auger Observatory during the past 3.7 years, we demonstrated a correlation between the arrival directions of cosmic rays with energy above 6 × 1019 electron volts and the positions of active galactic nuclei (AGN) lying within ∼75 megaparsecs. We rejected the hypothesis of an isotropic distribution of these cosmic rays with at least a 99% confidence level from a prescribed a priori test. The correlation we observed is compatible with the hypothesis that the highest-energy particles originate from nearby extragalactic sources whose flux has not been substantially reduced by interaction with the cosmic background radiation. AGN or objects having a similar spatial distribution are possible sources. Instituto de Física La Plata
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=od______1329::471d5b0d393f8a68463f863fc1f629e5 http://sedici.unlp.edu.ar/handle/10915/127997 Zobrazit plný text záznamu