Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei
Articolo
Data di Pubblicazione:
2008
Citazione:
Correlation of the highest-energy cosmic rays with the positions of nearby active galactic nuclei / J. Abraham , P. Abreu, M. Aglietta, C. Aguirre , D. Allard, I. Allekotte, J. Allen, P. Allison, J. Alvarez-Muniz, M. Ambrosio, L. Anchordoqui, S. Andringa, A. Anzalone, C. Aramo, S. Argiro, K. Arisaka, E. Armengaud, F. Arneodo, F. Arqueros, T. Asch, H. Asorey, P. Assis, B.S. Atulugama, J. Aublin, M. Ave, G. Avila, T. Backer, D. Badagnani, A.F. Barbosa, D. Barnhill, S.L.C. Barroso, P. Bauleo, J.J. Beatty, T. Beau, B.R. Becker, K.H. Becker, J.A. Bellido, S. BenZvi, C. Berat, T. Bergmann, P. Bernardini, X. Bertou, P.L. Biermann, P. Billoir, O. Blanch-Bigas, F. Blanco, P. Blasi, C. Bleve, H. Blumer, M. Bohacova, C. Bonifazi, R. Bonino, J. Brack, P. Brogueira, W.C. Brown, P. Buchholz, A. Bueno, R.E. Burton, N.G. Busca, K.S. Caballero-Mora, B. Cai, D.V. Camin, L. Caramete, R. Caruso, W. Carvalho, A. Castellina, O. Catalano, G. Cataldi, L. Cazon, R. Cester, J. Chauvin, A. Chiavassa, J.A. Chinellato, A. Chou, J. Chye, R.W. Clay, E. Colombo, R. Conceicao, B. Connolly, F. Contreras, J. Coppens, A. Cordier, U. Cotti, S. Coutu, C.E. Covault, A. Creusot, A. Criss, J. Cronin, A. Curutiu, S. Dagoret-Campagne, K. Daumiller, B.R. Dawson, R.M. de Almeida, C. De Donato, S.J. de Jong, G. De La Vega, W.J.M. de Mello Junior, J.R.T. de Mello Neto, I. De Mitri, V. de Souza, L. del Peral, O. Deligny, A. Della Selva, C. Delle Fratte, H. Dembinski, C. Di Giulio, J.C. Diaz, P.N. Diep, C. Dobrigkeit, J.C. D’Olivo, P.N. Dong, D. Dornic, A. Dorofeev, J.C. dos Anjos, M.T. Dova, D. D’Urso, I. Dutan, M.A. DuVernois, R. Engel, L. Epele, M. Erdmann, C.O. Escobar, A. Etchegoyen, P. Facal San Luis,
H. Falcke, G. Farrar, A.C. Fauth, N. Fazzini, F. Ferrer, S. Ferry, B. Fick, A. Filevich, A. Filipcic, I. Fleck, C.E. Fracchiolla, W. Fulgione, B. Garcıa, D. Garcıa Gamez, D. Garcia-Pinto, X. Garrido, H. Geenen, G. Gelmini, H. Gemmeke, P.L. Ghia, M. Giller, H. Glass, M.S. Gold, G. Golup, F. Gomez Albarracin, M. Gomez Berisso, R. Gomez Herrero, P. Goncalves, M. Goncalves do Amaral, D. Gonzalez, J.G. Gonzalez, M. Gonzalez, D. Gora, A. Gorgi, P. Gouffon, V. Grassi, A.F. Grillo, C. Grunfeld, Y. Guardincerri, F. Guarino, G.P. Guedes, J. Gutierrez, J.D. Hague, J.C. Hamilton, P. Hansen, D. Harari, S. Harmsma, J.L. Harton, A. Haungs, T. Hauschildt, M.D. Healy, T. Hebbeker, G. Hebrero, D. Heck, C. Hojvat, V.C. Holmes, P. Homola, J. Horandel, A. Horneffer, M. Horvat, M. Hrabovsky, T. Huege, M. Hussain, M. Iarlori, A. Insolia, F. Ionita, A. Italiano, M. Kaducak, K.H. Kampert, T. Karova, B. Kegl, B. Keilhauer, E. Kemp, R.M. Kieckhafer, H.O. Klages, M. Kleifges, J. Kleinfeller, R. Knapik, J. Knapp, D.-H. Koang, A. Krieger, O. Kromer, D. Kuempel, N. Kunka, A. Kusenko, G. La Rosa, C. Lachaud, B.L. Lago, D. Lebrun, P. LeBrun, J. Lee, M.A. Leigui de Oliveira, A. Letessier-Selvon, M. Leuthold, I. Lhenry-Yvon, R. Lopez, A. Lopez Aguera, J. Lozano Bahilo , R. Luna Garcıa , M.C. Maccarone , C. Macolino, S. Maldera, G. Mancarella, M.E. Mancenido, D. Mandat, P. Mantsch, A.G. Mariazzi, I.C. Maris, H.R. Marquez Falcon, D. Martello, J. Martınez, O. Martınez Bravo, H.J. Mathes, J. Matthews, J.A.J. Matthews, G. Matthiae, D. Maurizio, P.O. Mazur, T. McCauley, M. McEwen, R.R. McNeil, M.C. Medina, G. Medina-Tanco, A. Meli, D. Melo, E. Menichetti, A. Menschikov,
Chr. Meurer, R. Meyhandan, M.I. Micheletti, G. Miele, W. Miller, S. Mollerach, M. Monasor, D. Monnier Ragaigne, F. Montanet, B. Morales, C. Morello, J.C. Moreno, C. Morris, M. Mostafa, M.A. Muller, R. Mussa, G. Navarra, J.L. Navarro, S. Navas, P. Necesal, L. Nellen, C. Newman-Holmes, D. Newton, P.T. Nhung, N. Nierstenhoefer, D. Nitz, D. Nosek, L. Nozka, J. Oehlschlager,T. Ohnuki, A. Olinto, V.M. Olmos-Gilbaja, M. Ortiz, F. Ortolani,
S. Ostapchenko, L. Otero, N. Pacheco, D. Pakk Selmi-Dei, M. Palatka, J. Pallotta, G. Parente, E. Parizot, S. Parlati, S. Pastor, M. Patel, T. Paul, V. Pavlidou, K.
Abstract:
Data 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 Â 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 pres-
ent 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.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
AGN; Anisotropy; Auger; EGMF; Extra-galactic; GMF; GZK; High energy cosmic rays; Observatory; UHECR
Elenco autori:
J. Abraham , P. Abreu, M. Aglietta, C. Aguirre , D. Allard, I. Allekotte, J. Allen, P. Allison, J. Alvarez-Muniz, M. Ambrosio, L. Anchordoqui, S. Andringa, A. Anzalone, C. Aramo, S. Argiro, K. Arisaka, E. Armengaud, F. Arneodo, F. Arqueros, T. Asch, H. Asorey, P. Assis, B.S. Atulugama, J. Aublin, M. Ave, G. Avila, T. Backer, D. Badagnani, A.F. Barbosa, D. Barnhill, S.L.C. Barroso, P. Bauleo, J.J. Beatty, T. Beau, B.R. Becker, K.H. Becker, J.A. Bellido, S. BenZvi, C. Berat, T. Bergmann, P. Bernardini, X. Bertou, P.L. Biermann, P. Billoir, O. Blanch-Bigas, F. Blanco, P. Blasi, C. Bleve, H. Blumer, M. Bohacova, C. Bonifazi, R. Bonino, J. Brack, P. Brogueira, W.C. Brown, P. Buchholz, A. Bueno, R.E. Burton, N.G. Busca, K.S. Caballero-Mora, B. Cai, D.V. Camin, L. Caramete, R. Caruso, W. Carvalho, A. Castellina, O. Catalano, G. Cataldi, L. Cazon, R. Cester, J. Chauvin, A. Chiavassa, J.A. Chinellato, A. Chou, J. Chye, R.W. Clay, E. Colombo, R. Conceicao, B. Connolly, F. Contreras, J. Coppens, A. Cordier, U. Cotti, S. Coutu, C.E. Covault, A. Creusot, A. Criss, J. Cronin, A. Curutiu, S. Dagoret-Campagne, K. Daumiller, B.R. Dawson, R.M. de Almeida, C. De Donato, S.J. de Jong, G. De La Vega, W.J.M. de Mello Junior, J.R.T. de Mello Neto, I. De Mitri, V. de Souza, L. del Peral, O. Deligny, A. Della Selva, C. Delle Fratte, H. Dembinski, C. Di Giulio, J.C. Diaz, P.N. Diep, C. Dobrigkeit, J.C. D’Olivo, P.N. Dong, D. Dornic, A. Dorofeev, J.C. dos Anjos, M.T. Dova, D. D’Urso, I. Dutan, M.A. DuVernois, R. Engel, L. Epele, M. Erdmann, C.O. Escobar, A. Etchegoyen, P. Facal San Luis,
H. Falcke, G. Farrar, A.C. Fauth, N. Fazzini, F. Ferrer, S. Ferry, B. Fick, A. Filevich, A. Filipcic, I. Fleck, C.E. Fracchiolla, W. Fulgione, B. Garcıa, D. Garcıa Gamez, D. Garcia-Pinto, X. Garrido, H. Geenen, G. Gelmini, H. Gemmeke, P.L. Ghia, M. Giller, H. Glass, M.S. Gold, G. Golup, F. Gomez Albarracin, M. Gomez Berisso, R. Gomez Herrero, P. Goncalves, M. Goncalves do Amaral, D. Gonzalez, J.G. Gonzalez, M. Gonzalez, D. Gora, A. Gorgi, P. Gouffon, V. Grassi, A.F. Grillo, C. Grunfeld, Y. Guardincerri, F. Guarino, G.P. Guedes, J. Gutierrez, J.D. Hague, J.C. Hamilton, P. Hansen, D. Harari, S. Harmsma, J.L. Harton, A. Haungs, T. Hauschildt, M.D. Healy, T. Hebbeker, G. Hebrero, D. Heck, C. Hojvat, V.C. Holmes, P. Homola, J. Horandel, A. Horneffer, M. Horvat, M. Hrabovsky, T. Huege, M. Hussain, M. Iarlori, A. Insolia, F. Ionita, A. Italiano, M. Kaducak, K.H. Kampert, T. Karova, B. Kegl, B. Keilhauer, E. Kemp, R.M. Kieckhafer, H.O. Klages, M. Kleifges, J. Kleinfeller, R. Knapik, J. Knapp, D.-H. Koang, A. Krieger, O. Kromer, D. Kuempel, N. Kunka, A. Kusenko, G. La Rosa, C. Lachaud, B.L. Lago, D. Lebrun, P. LeBrun, J. Lee, M.A. Leigui de Oliveira, A. Letessier-Selvon, M. Leuthold, I. Lhenry-Yvon, R. Lopez, A. Lopez Aguera, J. Lozano Bahilo , R. Luna Garcıa , M.C. Maccarone , C. Macolino, S. Maldera, G. Mancarella, M.E. Mancenido, D. Mandat, P. Mantsch, A.G. Mariazzi, I.C. Maris, H.R. Marquez Falcon, D. Martello, J. Martınez, O. Martınez Bravo, H.J. Mathes, J. Matthews, J.A.J. Matthews, G. Matthiae, D. Maurizio, P.O. Mazur, T. McCauley, M. McEwen, R.R. McNeil, M.C. Medina, G. Medina-Tanco, A. Meli, D. Melo, E. Menichetti, A. Menschikov,
Chr. Meurer, R. Meyhandan, M.I. Micheletti, G. Miele, W. Miller, S. Mollerach, M. Monasor, D. Monnier Ragaigne, F. Montanet, B. Morales, C. Morello, J.C. Moreno, C. Morris, M. Mostafa, M.A. Muller, R. Mussa, G. Navarra, J.L. Navarro, S. Navas, P. Necesal, L. Nellen, C. Newman-Holmes, D. Newton, P.T. Nhung, N. Nierstenhoefer, D. Nitz, D. Nosek, L. Nozka, J. Oehlschlager,T. Ohnuki, A. Olinto, V.M. Olmos-Gilbaja, M. Ortiz, F. Ortolani,
S. Ostapchenko, L. Otero, N. Pacheco, D. Pakk Selmi-Dei, M. Palatka, J. Pallotta, G. Parente, E. Parizot, S. Parlati, S. Pastor, M. Patel, T. Paul, V. Pavlidou, K. Payet, M. Pech, J. Pekala, R. Pelayo, I.M. Pepe, L. Perrone, S. Petrera, P. Petrinca, Y. Petrov, A.
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