A thorough search for large-scale anisotropies in the distribution of arrival directions of cosmic rays detected above 10 18 eV at the Pierre Auger Observatory is presented. This search is performed as a function of both declination and right ascension in several energy ranges above 10 18 eV, and reported in terms of dipolar and quadrupolar coefficients. Within the systematic uncertainties, no significant deviation from isotropy is revealed. Assuming that any cosmic-ray anisotropy is dominated by dipole and quadrupole moments in this energy range, upper limits on their amplitudes are derived. These upper limits allow us to test the origin of cosmic rays above 10 18 eV from stationary Galactic sources densely distributed in the Galactic disk and predominantly emitting light particles in all directions. © 2012. The American Astronomical Society. All rights reserved..
Documento: | Artículo |
Título: | Large-scale distribution of arrival directions of cosmic rays detected above 10 18 eV at the Pierre Auger Observatory |
Autor: | Multitudinario:513 |
Filiación: | Universidad Autonoma de Chiapas, Mexico LIP, Instituto Superior Técnico, Technical University of Lisbon, Portugal Istituto di Fisica Dello Spazio Interplanetario (INAF), Università di Torino, Sezione INFN, Torino, Italy University of Wisconsin, Madison, WI, United States Fermilab, Batavia, IL, United States Instituto de Física, Universidade de São Paulo, São Paulo, SP, Brazil Laboratoire AstroParticule et Cosmologie (APC), Université Paris 7, CNRS-IN2P3, Paris, France Centro Atómico Bariloche, Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina New York University, New York, NY, United States Ohio State University, Columbus, OH, United States Facultad Regional Buenos Aires, Universidad Tecnológica Nacional, Buenos Aires, Argentina Instituto de Tecnologías en Detección y Astropartí culas (CNEA, CONICET, UNSAM, Buenos Aires, Argentina Universidad Nacional Autonoma de Mexico, D. F. Mexico, Mexico Universidad de Santiago de Compostela, Spain IFGW, Universidade Estadual de Campinas, SP, Campinas, Brazil Università di Napoli Federico II, Sezione INFN, Napoli, Italy IMAPP, Radboud University, Nijmegen, Netherlands University of Wisconsin, Milwaukee, WI, United States Rudjer Boškovi'c Institute, 10000 Zagreb, Croatia IFLP, Universidad Nacional de la Plata, CONICET, La Plata, Argentina Universidad Complutense de Madrid, Madrid, Spain Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Universités Paris 6 et Paris 7, CNRS-IN2P3, Paris, France Karlsruhe Institute of Technology-Campus, South-Institut für Experimentelle Kernphysik (IEKP), Karlsruhe, Germany Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier Grenoble, CNRS-IN2P3, Grenoble INP, France Observatorio Pierre Auger and Comisión Nacional Lde Energía Atómica, Malargüe, Argentina University Politehnica of Bucharest, Romania Karlsruhe Institute of Technology-Campus, North-Institut für Prozessdatenverarbeitung und Elektronik, Karlsruhe, Germany University of Adelaide, Adelaide, SA, Australia Centro Brasileiro de Pesquisas Fisicas, RJ Rio de Janeiro, Brazil Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris 11, CNRS-IN2P3, France Universidade Estadual Do Sudoeste da Bahia, Vitoria da Conquista, BA, Brazil Karlsruhe Institute of Technology-Campus, North-Institut für Kernphysik, Karlsruhe, Germany Bergische Universität Wuppertal, Wuppertal, Germany SUBATECH, École des Mines de Nantes, Université de Nantes, France Max-Planck-Institut für Radioastronomie, Bonn, Germany Universidad de Alcalá, Alcalá de Henares, Madrid, Spain Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic Università di Roma II Tor Vergata, Sezione INFN, Rome, Italy Instituto de Física, Universidade Federal Do Rio de Janeiro, RJ, Rio de Janeiro, Brazil Institute of Nuclear Physics PAN, Krakow, Poland Colorado State University, Fort Collins, CO, United States Horia Hulubei National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, Romania Colorado State University, Pueblo, CO, United States School of Physics and Astronomy, University of Leeds, United Kingdom Universität Siegen, Siegen, Germany Universidad de Granada, C. A.F. P.E., Granada, Spain Case Western Reserve University, Cleveland, OH, United States Pennsylvania State University, University Park, PA, United States Università di Milano, Sezione INFN, Milan, Italy Università di Catania, Sezione INFN, Catania, Italy Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo (INAF), Palermo, Italy Dipartimento di Matematica e Fisica E. de Giorgi, Università Del Salento, Sezione INFN, Lecce, Italy Università di Torino, Sezione INFN, Torino, Italy Michigan Technological University, Houghton, MI, United States Observatorio Pierre Auger, Malargüe, Argentina Nikhef, Science Park, Amsterdam, Netherlands Enrico Fermi Institute, University of Chicago, Chicago, IL, United States Instituto de Astronomía y Física Del Espacio (CONICET-UBA), Buenos Aires, Argentina Departamento de Física, FCEyN, Universidad de Buenos Aires y CONICET, Argentina Universidade Federal Fluminense, EEIMVR, RJ, Volta Redonda, Brazil Faculty Mendoza (CONICET/CNEA), National Technological University, Mendoza, Argentina Instituto de Física, Universidade de São Paulo, São Carlos, SP, Brazil Kernfysisch Versneller Instituut, University of Groningen, Groningen, Netherlands Institut de Physique Nucléaire d'Orsay (IPNO), Université Paris 11, CNRS-IN2P3, Orsay, France Università dell'Aquila, INFN, L'Aquila, Italy Institute for Nuclear Science and Technology (INST), Hanoi, Viet Nam III. Physikalisches Institut A, RWTH Aachen University, Aachen, Germany ASTRON, Dwingeloo, Netherlands J. Stefan Institute, Ljubljana, Slovenia Laboratory for Astroparticle Physics, University of Nova Gorica, Slovenia Dipartimento di Fisica dell'Università, INFN, Genova, Italy University of Łódź, Łódź, Poland University of New Mexico, Albuquerque, NM, United States INFN, Laboratori Nazionali Del Gran Sasso, Assergi (L'Aquila), Italy Universidade Estadual de Feira de Santana, Brazil RCPTM, Palacky University, Olomouc, Czech Republic Faculty of Mathematics and Physics, Institute of Particle and Nuclear Physics, Charles University, Prague, Czech Republic Louisiana State University, Baton Rouge, LA, United States Universität Hamburg, Hamburg, Germany Universidade Federal Do ABC, SP Santo André, Brazil Benemérita Universidad Autónoma de Puebla, Puebla, Mexico Universidad Michoacana de San Nicolas de Hidalgo, Michoacan, Morelia, Mexico Centro de Investigación y de Estudios Avanzados Del IPN (CINVESTAV), México, Mexico Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford, United Kingdom University of Hawaii, Honolulu, HI, United States Instituto de Física de Rosario (IFIR)-CONICET, U. N.R. and Facultad de Ciencias Bioquímicas y Farmacéuticas U. N.R., Rosario, Argentina Centro de Investigaciones en Láseres y Aplicaciones, CITEDEF and CONICET, Argentina Instituto de Física Corpuscular, CSIC-Universitat de València, Valencia, Spain Northeastern University, Boston, MA, United States Universidade Federal da Bahia, BA Salvador, Brazil University of Nebraska, Lincoln, NE, United States Colorado School of Mines, Golden, CO, United States Physics Department, University of Bucharest, Bucharest, Romania Argonne National Laboratory, Argonne, IL, United States Los Alamos National Laboratory, Los Alamos, NM, United States NYU Abu Dhabi, United Arab Emirates University of Maryland, United States Université de Lausanne, Switzerland Konan University, Kobe, Japan |
Palabras clave: | astroparticle physics; cosmic rays |
Año: | 2012 |
Volumen: | 203 |
Número: | 2 |
DOI: | http://dx.doi.org/10.1088/0067-0049/203/2/34 |
Título revista: | Astrophysical Journal, Supplement Series |
Título revista abreviado: | Astrophys. J. Suppl. Ser. |
ISSN: | 00670049 |
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00670049_v203_n2_p_Multitudinario |