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°to +45°in declination. After updating the fraction of events correlating with the active galactic nuclei (AGNs) in the Vron-Cetty and Vron 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 >; 58 EeV in rather large windows around Swift AGNs closer than 130 Mpc and brighter than 10 44 erg s -1 (18° radius), and around the direction of Cen A (15° radius). © 2015. The American Astronomical Society. All rights reserved.
Documento: | Artículo |
Título: | Searches for anisotropies in the arrival directions of the highest energy cosmic rays detected by the pierre auger observatory |
Autor: | Multitudinario:481 |
Filiación: | Centro Atómico Bariloche, Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina Centro de Investigaciones en Laseres y Aplicaciones, CITEDEF, CONICET, Argentina Departamento de Física, FCEyN, CONICET, Argentina IFLP, Universidad Nacional de la Plata, CONICET, La Plata, Argentina Instituto de Astronomía y Física Del Espacio (IAFE CONICET-UBA), Buenos Aires, Argentina Instituto de Física de Rosario (IFIR), CONICET/U.N.R., Facultad de Ciencias Bioquímicas y Farmacéuticas U.N.R., Rosario, Argentina Instituto de Tecnologías en Detección y Astropartículas (CNEA CONICET UNSAM), National Technological University, Faculty Mendoza (CONICET/CNEA), Mendoza, Argentina Instituto de Tecnologías en Detección y Astropartículas (CNEA CONICET UNSAM), Buenos Aires, Argentina Observatorio Pierre Auger, Malargüe, Argentina Observatorio Pierre Auger, Comisión Nacional de Energía Atómica, Malargüe, Argentina Universidad Tecnológica Nacional, Facultad Regional Buenos Aires, Buenos Aires, Argentina University of Adelaide, Adelaide, SA, Australia Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, RJ, Brazil Faculdade Independente Do Nordeste, Vitória da Conquista, Brazil Universidade de Sao Paulo, Escola de Engenharia de Lorena, Lorena, SP, Brazil Universidade de Sao Paulo, Instituto de Física de Sao Carlos, Sao Carlos, SP, Brazil Universidade de Sao Paulo, Instituto de Física, Sao Paulo, SP, Brazil Universidade Estadual de Campinas, IFGW, Campinas, SP, Brazil Universidade Estadual de Feira de Santana, Brazil Universidade Federal da Bahia, Salvador, BA, Brazil Universidade Federal de Pelotas, Pelotas, RS, Brazil Universidade Federal Do ABC, Santo André, SP, Brazil Universidade Federal Do Rio de Janeiro, Instituto de Física, Rio de Janeiro, RJ, Brazil Universidade Federal Fluminense, EEIMVR, Volta Redonda, RJ, Brazil Rudjer Bošković Institute, Zagreb, 10000, Croatia Charles University, Faculty of Mathematics and Physics, Institute of Particle and Nuclear Physics, Prague, Czech Republic Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic Palacky University, RCPTM, Olomouc, Czech Republic Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris 11, CNRS-IN2P3, France Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris 11, CNRS-IN2P3, France Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Universités Paris 6 et Paris 7, CNRS-IN2P3, Paris, France Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Grenoble-Alpes, CNRS/IN2P3, France Station de Radioastronomie de Nancay, Observatoire de Paris, CNRS/INSU, France SUBATECH, Ecole des Mines de Nantes, Université de Nantes, France Bergische Universitat Wuppertal, Wuppertal, Germany Karlsruhe Institute of Technology, Campus South, Institut für Experimentelle Kernphysik (IEKP), Karlsruhe, Germany Karlsruhe Institute of Technology, Campus North, Institut für Kernphysik, Karlsruhe, Germany Karlsruhe Institute of Technology, Campus North, Institut für Prozessdatenverarbeitung und Elektronik, Karlsruhe, Germany Max-Planck-Institut für Radioastronomie, Bonn, Germany RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany Universitat Hamburg, Hamburg, Germany Universität Siegen, Siegen, Germany Universitá di Milano and Sezione INFN, Milan, Italy Universitá di Napoli Federico II, Sezione INFN, Napoli, Italy Universitá di Roma II Tor Vergata, Sezione INFN, Rome, Italy Universitá di Catania, Sezione INFN, Catania, Italy Universitá di Torino and Sezione INFN, Torino, Italy Dipartimento di Matematica e Fisicae. de Giorgi, Dell'Universitá Del Salento, Sezione INFN, Lecce, Italy Dipartimento di Scienze Fisiche e Chimiche, Universitá dell'Aquila, INFN, Italy Gran Sasso Science Institute (INFN), L'Aquila, Italy Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo (INAF), Palermo, Italy INFN, Laboratori Nazionali Del Gran Sasso, Assergi (L'Aquila), Italy Osservatorio Astrofisico di Torino (INAF), Universitá di Torino, Sezione INFN, Torino, Italy Benemérita Universidad Autónoma de Puebla, Puebla, Mexico Centro de Investigación y de Estudios Avanzados Del IPN (CINVESTAV), México, Mexico Universidad Michoacana de San Nicolas de Hidalgo, Michoacan, Morelia, Mexico Universidad Nacional Autonoma de Mexico, Mexico, DF, Mexico IMAPP, Radboud University, Nijmegen, Netherlands KVI, Center for Advanced Radiation Technology, University of Groningen, Netherlands Nikhef, Science Park, Amsterdam, Netherlands ASTRON, Dwingeloo, Netherlands Institute of Nuclear Physics PAN, Krakow, Poland University of Łódź, Łódź, Poland Laboratório de Instrumentacao e Física Experimental de Partículas-LIP, Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Portugal 'Horia Hulubei' National Institute for Physics and Nuclear Engineering, Bucharest- Magurele, Romania Institute of Space Sciences, Bucharest, Romania University of Bucharest, Physics Department, Romania University Politehnica of Bucharest, Romania Experimental Particle Physics Department, J. Stefan Institute, Ljubljana, Slovenia Laboratory for Astroparticle Physics, University of Nova Gorica, Slovenia Universidad Complutense de Madrid, Madrid, Spain Universidad de Alcala, Alcala de Henares (Madrid), Spain Universidad de Granada and C.A.F.P.E., Granada, Spain Universidad de Santiago de Compostela, Spain School of Physics and Astronomy, University of Leeds, United Kingdom Case Western Reserve University, Cleveland, OH, United States Colorado School of Mines, Golden, CO, United States Colorado State University, Fort Collins, CO, United States Colorado State University, Pueblo, CO, United States Department of Physics and Astronomy, Lehman College, City University of New York, New York, United States Fermilab, Batavia, IL, United States Louisiana State University, Baton Rouge, LA, United States Michigan Technological University, Houghton, MI, United States New York University, New York, NY, United States Northeastern University, Boston, MA, United States Ohio State University, Columbus, OH, United States Pennsylvania State University, University Park, PA, United States University of Chicago, Enrico Fermi Institute, Chicago, IL, United States University of Hawaii, Honolulu, HI, United States University of Nebraska, Lincoln, NE, United States University of New Mexico, Albuquerque, NM, United States |
Palabras clave: | acceleration of particles; astroparticle physics |
Año: | 2015 |
Volumen: | 804 |
Número: | 1 |
DOI: | http://dx.doi.org/10.1088/0004-637X/804/1/15 |
Título revista: | Astrophysical Journal |
Título revista abreviado: | Astrophys. J. |
ISSN: | 0004637X |
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0004637X_v804_n1_p_Multitudinario |