Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of the Pierre Auger Observatory. We investigate local regions around the highest-energy cosmic rays with E ≥ 6×1019 eV by analyzing cosmic rays with energies above E ≥ 5×1018 eV arriving within an angular separation of approximately 15∘. We characterize the energy distributions inside these regions by two independent methods, one searching for angular dependence of energy-energy correlations and one searching for collimation of energy along the local system of principal axes of the energy distribution. No significant patterns are found with this analysis. The comparison of these measurements with astrophysical scenarios can therefore be used to obtain constraints on related model parameters such as strength of cosmic-ray deflection and density of point sources. © 2015, The Author(s).
Documento: | Artículo |
Título: | Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory |
Autor: | Multitudinario:487 |
Filiación: | Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina Centro de Investigaciones en Láseres y Aplicaciones, CITEDEF and CONICET, Villa Martelli, Buenos Aires, Argentina Departamento de Física, FCEyN Universidad de Buenos Aires y CONICET, Buenos Aires, Argentina IFLP, Universidad Nacional de La Plata and CONICET, La Plata, Argentina Instituto de Astronomía y Física del Espacio (CONICET-UBA), Buenos Aires, Argentina Instituto de Física de Rosario (IFIR), CONICET/U.N.R. and Facultad de Ciencias Bioquímicas y Farmacéuticas U.N.R., Rosario, Argentina Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM) and 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 and 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 São Paulo, Escola de Engenharia de Lorena, Lorena, SP, Brazil Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil Instituto de Física, Universidade de São Paulo, São Paulo, SP, Brazil Universidade Estadual de Campinas, IFGW, Campinas, SP, Brazil Universidade Estadual de Feira de Santana, 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 Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil Universidade Federal Fluminense, EEIMVR, Volta Redonda, RJ, Brazil Rudjer Bošković Institute, Zagreb, 10000, Croatia Faculty of Mathematics and Physics, Institute of Particle and Nuclear Physics, Charles University, Prague, Czech Republic Institute of Physics of the 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, Orsay, France Laboratoire de l’Accélérateur Linéaire (LAL), Université Paris 11, CNRS-IN2P3, Orsay, 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, Grenoble, France Station de Radioastronomie de Nançay, Observatoire de Paris, CNRS/INSU, Nançay, France SUBATECH, École des Mines de Nantes, CNRS-IN2P3, Université de Nantes, Nantes, France Bergische Universität 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 Universität Hamburg, Hamburg, Germany Universität Siegen, Siegen, Germany Università di Milano and Sezione INFN, Milan, Italy Università di Napoli “Federico II” and Sezione INFN, Napoli, Italy Università di Roma II “Tor Vergata” and Sezione INFN, Roma, Italy Università di Catania and Sezione INFN, Catania, Italy Università di Torino and Sezione INFN, Torino, Italy Dipartimento di Matematica e Fisica “E. De Giorgi” dell’Università del Salento and Sezione INFN, Lecce, Italy Dipartimento di Scienze Fisiche e Chimiche dell’Università dell’Aquila and INFN, L’Aquila, 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), Università di Torino and Sezione INFN, Torino, Italy Benemérita Universidad Autónoma de Puebla, Puebla, Mexico Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV), Mexico, Mexico Universidad Michoacana de San Nicolas de Hidalgo, Morelia, Michoacan, Mexico Universidad Nacional Autonoma de Mexico, Mexico, D.F., Mexico IMAPP, Radboud University Nijmegen, Nijmegen, Netherlands KVI - Center for Advanced Radiation Technology, University of Groningen, Groningen, Netherlands Nikhef, Science Park, Amsterdam, Netherlands ASTRON, Dwingeloo, Netherlands Institute of Nuclear Physics PAN, Krakow, Poland University of Łódź, Łódź, Poland Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisbon, Portugal ’Horia Hulubei’ National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, Romania Institute of Space Sciences, Bucharest-Magurele, Romania Physics Department, University of Bucharest, Bucharest, Romania University Politehnica of Bucharest, Bucharest, Romania Experimental Particle Physics Department, J. Stefan Institute, Ljubljana, Slovenia Laboratory for Astroparticle Physics, University of Nova Gorica, Nova Gorica, Slovenia Universidad Complutense de Madrid, Madrid, Spain Universidad de Alcalá, Alcalá de Henares, Madrid, Spain Universidad de Granada and C.A.F.P.E., Granada, Spain Universidad de Santiago de Compostela, Santiago de Compostela, Spain School of Physics and Astronomy, University of Leeds, 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, 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 Enrico Fermi Institute, University of Chicago, 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 Konan University, Japan Universidad Autonoma de Chiapas, Mexico NYU Abu Dhabi, United States Unidad Profesional Interdisciplinaria de Ingeniería y Tecnologías Avanzadas del IPN, México, D.F., Mexico Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas, Mexico |
Año: | 2015 |
Volumen: | 75 |
Número: | 6 |
DOI: | http://dx.doi.org/10.1140/epjc/s10052-015-3471-0 |
Título revista: | European Physical Journal C |
Título revista abreviado: | Eur. Phys. J. C |
ISSN: | 14346044 |
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v75_n6_p_Multitudinario |