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  • Correlation of the highest-...
    Allen, J; Alvarez, C; Aramo, C; Arneodo, F; Arqueros, F; Barnhill, D; Beatty, J; Bertou, X; Blanch-Bigas, O; Blanco, F; Caballero-Mora, K S; Caruso, R; Catalano, O; Cataldi, G; Chauvin, J; Chou, A; Connolly, B; Coutu, S; Daumiller, K; de Almeida, R M; Del Peral, L; Fratte, C Delle; Dornic, D; Escobar, C O; Etchegoyen, A; Ferry, S; Fick, B; Filevich, A; Fulgione, W; García, B; García Gámez, D; Garcia-Pinto, D; Glass, H; Golup, G; Albarracin, F Gomez; Berisso, M Gómez; Herrero, R Gómez; Góra, D; Gorgi, A; Gouffon, P; Guedes, G P; Hansen, P; Harmsma, S; Heck, D; Hörandel, J; Horneffer, A; Kaducak, M; Kampert, K H; Kleinfeller, J; Knapik, R; Krömer, O; Lopez Agüera, A; Maccarone, M C; Mancarella, G; Mantsch, P; Maris, I C; Matthiae, G; Medina, M C; Meli, A; Miele, G; Morello, C; Moreno, J C; Navarra, G; Newton, D; Parizot, E; Paul, T; Pavlidou, V; Payet, K; Pech, M; Pekala, J; Pelayo, R; Ngoc, Dongpham; Pham Thi, T N; Revenu, B; Rezende, F A S; Rodriguez Martino, J; Ros, G; Rovero, A C; Santo, C E; Sarkar, S; Scherini, V; Schmidt, T; Smialkowski, A; Snow, G R; Stutz, A; Swain, J; Todero Peixoto, C J; Tristram, G; Tueros, M; Urban, M; Valore, L; Videla, M; Villaseñor, L; Wainberg, O; Warner, D; Wieczorek, G; Wilczynska, B; Wileman, C; Zavrtanik, D; Zech, A

    Science (American Association for the Advancement of Science), 11/2007, Letnik: 318, Številka: 5852
    Journal Article

    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 x 10(19) electron volts and the positions of active galactic nuclei (AGN) lying within approximately 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.