Title: | Searches for Anisotropies in the Arrival Directions of the Highest Energy Cosmic Rays Detected by the Pierre Auger Observatory |
Authors: | Aab, A. Abreu, P. AGLIETTA, MARCO Ahn, E. J. Samarai, I. Al Albuquerque, I. F. M. Allekotte, I. Allen, J. Allison, P. Almela, A. Alvarez Castillo, J. Alvarez-Muñiz, J. Alves Batista, R. Ambrosio, M. Aminaei, A. Anchordoqui, L. Andringa, S. Aramo, C. Aranda, V. M. Arqueros, F. Asorey, H. Assis, P. Aublin, J. Ave, M. Avenier, M. Avila, G. Awal, N. Badescu, A. M. Barber, K. B. Bäuml, J. Baus, C. Beatty, J. J. Becker, K. H. Bellido, J. A. Berat, C. Bertaina, M. E. Bertou, X. Biermann, P. L. Billoir, P. Blaess, S. G. Blanco, M. Bleve, C. Blümer, H. Boháčová, M. Boncioli, D. Bonifazi, C. Bonino, R. Borodai, N. Brack, J. Brancus, I. Bridgeman, A. Brogueira, P. Brown, W. C. Buchholz, P. Bueno, A. Buitink, S. Buscemi, M. Caballero-Mora, K. S. Caccianiga, B. Caccianiga, L. Candusso, M. Caramete, L. Caruso, R. CASTELLINA, ANTONELLA Cataldi, G. Cazon, L. Cester, R. Chavez, A. G. Chiavassa, A. Chinellato, J. A. Chudoba, J. Cilmo, M. Clay, R. W. Cocciolo, G. Colalillo, R. Coleman, A. Collica, L. Coluccia, M. R. Conceição, R. Contreras, F. Cooper, M. J. Cordier, A. Coutu, S. Covault, C. E. Cronin, J. Curutiu, A. Dallier, R. Daniel, B. Dasso, S. Daumiller, K. Dawson, B. R. de Almeida, R. M. De Domenico, M. de Jong, S. J. de Mello Neto, J. R. T. De Mitri, I. de Oliveira, J. de Souza, V. del Peral, L. Deligny, O. Dembinski, H. Dhital, N. Di Giulio, C. Di Matteo, A. Diaz, J. C. Díaz Castro, M. L. Diogo, F. Dobrigkeit, C. Docters, W. D'Olivo, J. C. Dorofeev, A. Dorosti Hasankiadeh, Q. Dova, M. T. Ebr, J. Engel, R. Erdmann, M. Erfani, M. Escobar, C. O. Espadanal, J. Etchegoyen, A. Facal San Luis, P. Falcke, H. Fang, K. Farrar, G. Fauth, A. C. Fazzini, N. Ferguson, A. P. Fernandes, M. Fick, B. Figueira, J. M. Filevich, A. Filipčič, A. Fox, B. D. Fratu, O. Freire, M. M. Fröhlich, U. Fuchs, B. Fujii, T. Gaior, R. García, B. Garcia-Gamez, D. Garcia-Pinto, D. Garilli, G. Gascon Bravo, A. Gate, F. Gemmeke, H. Ghia, P. L. Giaccari, U. Giammarchi, M. Giller, M. Glaser, C. Glass, H. Gómez Berisso, M. Gómez Vitale, P. F. Gonçalves, P. Gonzalez, J. G. González, N. Gookin, B. Gordon, J. GORGI, Alessio Gorham, P. Gouffon, P. Grebe, S. Griffith, N. Grillo, A. F. Grubb, T. D. Guarino, F. Guedes, G. P. Hampel, M. R. Hansen, P. Harari, D. Harrison, T. A. Hartmann, S. Harton, J. L. Haungs, A. Hebbeker, T. Heck, D. Heimann, P. Herve, A. E. Hill, G. C. Hojvat, C. Hollon, N. Holt, E. Homola, P. Hörandel, J. R. Horvath, P. Hrabovský, M. Huber, D. Huege, T. Insolia, A. Isar, P. G. Jandt, I. Jansen, S. Jarne, C. Josebachuili, M. Kääpä, A. Kambeitz, O. Kampert, K. H. Kasper, P. Katkov, I. Kégl, B. Keilhauer, B. Keivani, A. Kemp, E. Kieckhafer, R. M. Klages, H. O. Kleifges, M. Kleinfeller, J. Krause, R. Krohm, N. Krömer, O. Kruppke-Hansen, D. Kuempel, D. Kunka, N. LaHurd, D. Latronico, L. Lauer, R. Lauscher, M. Lautridou, P. Le Coz, S. Leão, M. S. A. B. Lebrun, D. Lebrun, P. Leigui de Oliveira, M. A. Letessier-Selvon, A. Lhenry-Yvon, I. Link, K. López, R. Louedec, K. Lozano Bahilo, J. Lu, L. Lucero, A. Ludwig, M. Malacari, M. Maldera, S. Mallamaci, M. Maller, J. Mandat, D. Mantsch, P. Mariazzi, A. G. Marin, V. Mariș, I. C. Marsella, G. Martello, D. Martin, L. Martinez, H. Martínez Bravo, O. Martraire, D. Masías Meza, J. J. Mathes, H. J. Mathys, S. Matthews, J. Matthews, J. A. J. Matthiae, G. Maurel, D. Maurizio, D. Mayotte, E. Mazur, P. O. Medina, C. Medina-Tanco, G. Meissner, R. Melissas, M. Melo, D. Menshikov, A. MESSINA, Sergio Meyhandan, R. Mićanović, S. Micheletti, M. I. Middendorf, L. Minaya, I. A. Miramonti, L. Mitrica, B. Molina-Bueno, L. Mollerach, S. Monasor, M. Monnier Ragaigne, D. Montanet, F. Morello, C. Mostafá, M. Moura, C. A. Muller, M. A. Müller, G. Müller, S. Münchmeyer, M. Mussa, R. Navarra, G. Navas, S. Necesal, P. Nellen, L. Nelles, A. Neuser, J. Nguyen, P. H. Niechciol, M. Niemietz, L. Niggemann, T. Nitz, D. Nosek, D. Novotny, V. Nožka, L. Ochilo, L. Oikonomou, F. Olinto, A. Oliveira, M. Pacheco, N. Pakk Selmi-Dei, D. Palatka, M. Pallotta, J. Palmieri, N. Papenbreer, P. Parente, G. Parra, A. Paul, T. Pech, M. Pȩkala, J. Pelayo, R. Pepe, I. M. Perrone, L. Petermann, E. Peters, C. Petrera, S. Petrov, Y. Phuntsok, J. Piegaia, R. Pierog, T. Pieroni, P. Pimenta, M. Pirronello, V. Platino, M. Plum, M. Porcelli, A. Porowski, C. Prado, R. R. Privitera, P. Prouza, M. Purrello, V. Quel, E. J. Querchfeld, S. Quinn, S. Rautenberg, J. Ravel, O. Ravignani, D. Revenu, B. Ridky, J. RIGGI, Simone Risse, M. Ristori, P. Rizi, V. Rodrigues de Carvalho, W. Rodriguez Fernandez, G. Rodriguez Rojo, J. Rodríguez-Frías, M. D. Rogozin, D. Ros, G. Rosado, J. Rossler, T. Roth, M. Roulet, E. Rovero, A. C. Saffi, S. J. Saftoiu, A. Salamida, F. Salazar, H. Saleh, A. Salesa Greus, F. Salina, G. Sánchez, F. Sanchez-Lucas, P. Santo, C. E. Santos, E. Santos, E. M. Sarazin, F. Sarkar, B. Sarmento, R. Sato, R. Scharf, N. Scherini, V. Schieler, H. Schiffer, P. Schmidt, D. Scholten, O. Schoorlemmer, H. Schovánek, P. Schröder, F. G. Schulz, A. Schulz, J. Schumacher, J. Sciutto, S. J. SEGRETO, ALBERTO Settimo, M. Shadkam, A. Shellard, R. C. Sidelnik, I. Sigl, G. Sima, O. Śmiałkowski, A. Šmída, R. Snow, G. R. Sommers, P. Sorokin, J. Squartini, R. Srivastava, Y. N. Stanič, S. Stapleton, J. Stasielak, J. Stephan, M. Stutz, A. Suarez, F. Suomijärvi, T. Supanitsky, A. D. Sutherland, M. S. Swain, J. Szadkowski, Z. Szuba, M. Taborda, O. A. Tapia, A. Tepe, A. Theodoro, V. M. Timmermans, C. Todero Peixoto, C. J. Toma, G. Tomankova, L. Tomé, B. Tonachini, A. Torralba Elipe, G. Torres Machado, D. Travnicek, P. Trovato, E. Ulrich, R. Unger, M. Urban, M. Valdés Galicia, J. F. Valiño, I. Valore, L. van Aar, G. van Bodegom, P. van den Berg, A. M. van Velzen, S. van Vliet, A. Varela, E. Vargas Cárdenas, B. Varner, G. Vázquez, J. R. Vázquez, R. A. Veberič, D. Verzi, V. Vicha, J. Videla, M. Villase ñor, L. Vlcek, B. Vorobiov, S. Wahlberg, H. Wainberg, O. Walz, D. Watson, A. A. Weber, M. Weidenhaupt, K. Weindl, A. Werner, F. Widom, A. Wiencke, L. Wilczyńska, B. Wilczyński, H. Williams, C. Winchen, T. Wittkowski, D. Wundheiler, B. Wykes, S. Yamamoto, T. Yapici, T. Yuan, G. Yushkov, A. Zamorano, B. Zas, E. Zavrtanik, D. Zavrtanik, M. Zepeda, A. Zhou, J. Zhu, Y. Zimbres Silva, M. Ziolkowski, M. Zuccarello, Francesca Pierre Auger Collaboration |
Issue Date: | 2015 |
Journal: | THE ASTROPHYSICAL JOURNAL |
Number: | 804 |
Issue: | 1 |
First Page: | 15 |
Abstract: | We analyze the distribution of arrival directions of ultra-high-energy cosmic rays recorded at the Pierre Auger Observatory in 10 years of operation. The data set, about three times larger than that used in earlier studies, includes arrival directions with zenith angles up to 80°, thus covering from -90{}^\circ to +45{}^\circ in declination. After updating the fraction of events correlating with the active galactic nuclei (AGNs) in the Véron-Cetty and Véron catalog, we subject the arrival directions of the data with energies in excess of 40 EeV to different tests for anisotropy. We search for localized excess fluxes, self-clustering of event directions at angular scales up to 30°, and different threshold energies between 40 and 80 EeV. We then look for correlations of cosmic rays with celestial structures both in the Galaxy (the Galactic Center and Galactic Plane) and in the local universe (the Super-Galactic Plane). We also examine their correlation with different populations of nearby extragalactic objects: galaxies in the 2MRS catalog, AGNs detected by Swift-BAT, radio galaxies with jets, and the Centaurus A (Cen A) galaxy. None of the tests show statistically significant evidence of anisotropy. The strongest departures from isotropy (post-trial probability ∼ 1.4%) are obtained for cosmic rays with E\gt 58 EeV in rather large windows around Swift AGNs closer than 130 Mpc and brighter than 10<SUP>44</SUP> erg s<SUP>-1</SUP> (18° radius), and around the direction of Cen A (15° radius). |
Acknowledgments: | The successful installation, commissioning, and operation of the Pierre Auger Observatory would not have been possible without the strong commitment and effort of the technical and administrative staff in Malargüe. We are very grateful to the following agencies and organizations for their financial support: Comisión Nacional de Energía Atómica, Fundación Antorchas, Gobierno de la Provincia de Mendoza, Municipalidad de Malargüe, NDM Holdings and Valle Las Leñas, in gratitude for their continuing cooperation over land access, Argentina; the Australian Research Council; Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Financiadora de Estudos e Projetos (FINEP), Fundação de Amparo à Pesquisa do Estado de Rio de Janeiro (FAPERJ), São Paulo Research Foundation (FAPESP) Grants No. 2012/51015-5, 2010/07359-6, and No. 1999/05404-3, Ministério de Ciência e Tecnologia (MCT), Brazil; Grant No. MSMT-CR LG13007, No. 7AMB14AR005, No. CZ.1.05/2.1.00/03.0058, and the Czech Science Foundation Grant No. 14-17501 S, Czech Republic; Centre de Calcul IN2P3/CNRS, Centre National de la Recherche Scientifique (CNRS), Conseil Régional Ile-de-France, Département Physique Nucléaire et Corpusculaire (PNC-IN2P3/CNRS), Département Sciences de l’Univers (SDU-INSU/CNRS), Institut Lagrange de Paris (ILP) Grant No. LABEX ANR-10-LABX-63, within the Investissements d’Avenir Programme Grant No. ANR-11-IDEX-0004-02, France; Bundesministerium für Bildung und Forschung (BMBF), Deutsche Forschungsgemeinschaft (DFG), Finanzministerium Baden-Württemberg, Helmholtz-Gemeinschaft Deutscher Forschungszentren (HGF), Ministerium für Wissenschaft und Forschung, Nordrhein Westfalen, Ministerium für Wissenschaft, Forschung und Kunst, Baden-Württemberg, Germany; Istituto Nazionale di Fisica Nucleare (INFN), Ministero dell’Istruzione, dell’Università e della Ricerca (MIUR), Gran Sasso Center for Astroparticle Physics (CFA), CETEMPS Center of Excellence, Italy; Consejo Nacional de Ciencia y Tecnología (CONACYT), Mexico; Ministerie van Onderwijs, Cultuur en Wetenschap, Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Stichting voor Fundamenteel Onderzoek der Materie (FOM), Netherlands; National Centre for Research and Development, Grants No. ERA-NET-ASPERA/01/11 and No. ERA-NET-ASPERA/02/11, National Science Centre, Grants No. 2013/08/M/ST9/00322, No. 2013/08/M/ST9/00728, and No. HARMONIA 5-2013/10/M/ST9/00062, Poland; Portuguese national funds and FEDER funds within Programa Operacional Factores de Competitividade through Fundação para a Ciência e a Tecnologia (COMPETE), Portugal; Romanian Authority for Scientific Research ANCS, CNDI-UEFISCDI partnership projects Grants No. 20/2012 and No. 194/2012, Grants No. 1/ASPERA2/2012 ERA-NET, No. PN-II-RU-PD-2011-3-0145-17, and No. PN-II-RU-PD-2011-3-0062, the Minister of National Education, Programme Space Technology and Advanced Research (STAR), Grant No. 83/2013, Romania; Slovenian Research Agency, Slovenia; Comunidad de Madrid, FEDER funds, Ministerio de Educación y Ciencia, Xunta de Galicia, European Community 7th Framework Program, Grant No. FP7-PEOPLE-2012-IEF-328826, Spain; Science and Technology Facilities Council, United Kingdom; Department of Energy, Contracts No. DE-AC02-07CH11359, No. DE-FR02-04ER41300, No. DE-FG02-99ER41107, and No. DE-SC0011689, National Science Foundation, Grant No. 0450696, The Grainger Foundation, USA; NAFOSTED, Vietnam; Marie Curie-IRSES/EPLANET, European Particle Physics Latin American Network, European Union 7th Framework Program, Grant No. PIRSES-2009-GA-246806; and UNESCO. |
URI: | http://hdl.handle.net/20.500.12386/23865 |
URL: | https://iopscience.iop.org/article/10.1088/0004-637X/804/1/15 |
ISSN: | 0004-637X |
DOI: | 10.1088/0004-637X/804/1/15 |
Bibcode ADS: | 2015ApJ...804...15A |
Fulltext: | restricted |
Appears in Collections: | 1.01 Articoli in rivista
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