Artículo
Multitudinario:501 "A search for anisotropy in the arrival directions of ultra high energy cosmic rays recorded at the Pierre Auger Observatory" (2012) Journal of Cosmology and Astroparticle Physics. 2012(4)
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Abstract:
Observations of cosmic ray arrival directions made with the Pierre Auger Observatory have previously provided evidence of anisotropy at the 99% CL using the correlation of ultra high energy cosmic rays (UHECRs) with objects drawn from the Véron-Cetty Véron catalog. In this paper we report on the use of three catalog independent methods to search for anisotropy. The 2pt-L, 2pt+ and 3pt methods, each giving a different measure of self-clustering in arrival directions, were tested on mock cosmic ray data sets to study the impacts of sample size and magnetic smearing on their results, accounting for both angular and energy resolutions. If the sources of UHECRs follow the same large scale structure as ordinary galaxies in the local Universe and if UHECRs are deflected no more than a few degrees, a study of mock maps suggests that these three methods can efficiently respond to the resulting anisotropy with a P-value = 1.0% or smaller with data sets as few as 100 events. Using data taken from January 1, 2004 to July 31, 2010 we examined the 20,30,110 highest energy events with a corresponding minimum energy threshold of about 49.3 EeV. The minimum P-values found were 13.5% using the 2pt-L method, 1.0% using the 2pt+ method and 1.1% using the 3pt method for the highest 100 energy events. In view of the multiple (correlated) scans performed on the data set, these catalog-independent methods do not yield strong evidence of anisotropy in the highest energy cosmic rays. © 2012 IOP Publishing Ltd and Sissa Medialab srl.
Registro:
| Documento: | Artículo |
| Título: | A search for anisotropy in the arrival directions of ultra high energy cosmic rays recorded at the Pierre Auger Observatory |
| Autor: | Multitudinario:501 |
| Filiación: | Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina Centro de Investigaciones en Lseres y Aplicaciones, CITEFA, CONICET, Argentina Departamento de Física, FCEyN, Universidad de Buenos Aires y CONICET, Argentina IFLP, Universidad Nacional de la Plata, 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., Facultad de Ciencias Bioquímicas y Farmacéuticas U.N.R., Rosario, Argentina Instituto de Tecnologías en Detección y Astropartí culas (CNEA CONICET UNSAM), Buenos Aires, Argentina National Technological University, Faculty Mendoza (CONICET/CNEA), Mendoza, 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 S.A., Adelaide, Australia Centro Brasileiro de Pesquisas Fisicas, RJ, Rio de Janeiro, Brazil Pontifícia Universidade Católica, RJ, Rio de Janeiro, Brazil Universidade de so Paulo, Instituto de Física, São Carlos, SP, Brazil Universidade de so Paulo, Instituto de Física, São Paulo, SP, Brazil Universidade Estadual de Campinas, IFGW, SP Campinas, Brazil Universidade Estadual de Feira de Santana, Brazil Universidade Estadual Do Sudoeste da Bahia, Vitoria da Conquista, BA, Brazil Universidade Federal da Bahia, BA Salvador, Brazil Universidade Federal Do ABC, Santo André SP, Brazil Universidade Federal Do Rio de Janeiro, Instituto de Física, RJ, Rio de Janeiro, Brazil Universidade Federal Fluminense, EEIMVR, RJ Volta Redonda, Brazil Rudjer Bokovi'c Institute, 10000 Zagreb, 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, Orsay, France Laboratoire AstroParticule et Cosmologie (APC), Université Paris 7, CNRS-IN2P3, Paris, 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 Joseph Fourier, INPG, CNRS-IN2P3, Grenoble, France SUBATECH, Ecole des Mines de Nantes, Université de Nantes, Nantes, France Bergische Universität Wuppertal, Wuppertal, 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 Karlsruhe Institute of Technology, Campus South, Institut für Experimentelle Kernphysik (IEKP), 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 Dipartimento di Fisica dell'Università, INFN, Genova, Italy Università dell'Aquila, INFN, L'Aquila, Italy Università di Milano, Sezione INFN, Milan, Italy Dipartimento di Matematica e Fisica E. de Giorgi, Università Del Salento and Sezione, INFN, Lecce, Italy Università di Napoli Federico II, Sezione INFN, Napoli, Italy Università di Roma II Tor Vergata, Sezione INFN, Roma, Italy Università di Catania, Sezione INFN, Catania, Italy Università di Torino, Sezione INFN, Torino, Italy Dipartimento di Ingegneria dell'Innovazione, Università Del Salento, Sezione INFN, Lecce, Italy Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo (INAF), Palermo, Italy Istituto di Fisica Dello Spazio Interplanetario (INAF), Università di Torino, Sezione INFN, Torino, Italy INFN, Laboratori Nazionali Del Gran Sasso, Assergi (L'Aquila), Italy Benemérita Universidad Autónoma de Puebla, Puebla, Mexico Centro de Investigación y de Estudios Avanzados Del IPN (CINVESTAV), México, D.F., Mexico Universidad Michoacana de San Nicolas de Hidalgo, Michoacan, Morelia, Mexico Universidad Nacional Autonoma de Mexico, Mexico D.F., Mexico IMAPP, Radboud University, Nijmegen, Netherlands Kernfysisch Versneller Instituut, 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 LIP, Instituto Superior Técnico, Technical University of Lisbon, Portugal 'Horia Hulubei' National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, Romania University of Bucharest, Physics Department, Romania University Politehnica of Bucharest, Romania, Romania J. Stefan Institute, Ljubljana, Slovenia Laboratory for Astroparticle Physics, University of Nova Gorica, Slovenia Instituto de Física Corpuscular, CSIC-Universitat de València, Valencia, Spain Universidad Complutense de Madrid, Madrid, Spain Universidad de Alcal, Alcal de Henares (Madrid), Spain Universidad de Granada and C.A.F.P.E., Granada, Spain Universidad de Santiago de Compostela, Spain Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford, United Kingdom School of Physics and Astronomy, University of Leeds, United Kingdom Argonne National Laboratory, Argonne, IL, United States 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 Fermilab, Batavia, IL, United States Los Alamos National Laboratory, Los Alamos, NM, 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 Southern University, Baton Rouge, LA, United States University of Chicago, Enrico Fermi Institute, Chicago, IL, United States University of Nebraska, Lincoln, NE, United States University of New Mexico, Albuquerque, NM, United States University of Wisconsin, Madison, WI, United States University of Wisconsin, Milwaukee, WI, United States Institute for Nuclear Science and Technology (INST), Hanoi, Viet Nam Konan University, Kobe, Japan University of Maryland, United States NYU Abu Dhabi, United Arab Emirates Université de Lausanne, Switzerland |
| Año: | 2012 |
| Volumen: | 2012 |
| Número: | 4 |
| DOI: | http://dx.doi.org/10.1088/1475-7516/2012/04/040 |
| Título revista: | Journal of Cosmology and Astroparticle Physics |
| Título revista abreviado: | J. Cosmol. Astroparticle Phys. |
| ISSN: | 14757516 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14757516_v2012_n4_p_Multitudinario |
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Citas:
---------- APA ----------
(2012) . A search for anisotropy in the arrival directions of ultra high energy cosmic rays recorded at the Pierre Auger Observatory. Journal of Cosmology and Astroparticle Physics, 2012(4).http://dx.doi.org/10.1088/1475-7516/2012/04/040
---------- CHICAGO ----------
Multitudinario:501. "A search for anisotropy in the arrival directions of ultra high energy cosmic rays recorded at the Pierre Auger Observatory" . Journal of Cosmology and Astroparticle Physics 2012, no. 4 (2012).http://dx.doi.org/10.1088/1475-7516/2012/04/040
---------- MLA ----------
Multitudinario:501. "A search for anisotropy in the arrival directions of ultra high energy cosmic rays recorded at the Pierre Auger Observatory" . Journal of Cosmology and Astroparticle Physics, vol. 2012, no. 4, 2012.http://dx.doi.org/10.1088/1475-7516/2012/04/040
---------- VANCOUVER ----------
Multitudinario:501. A search for anisotropy in the arrival directions of ultra high energy cosmic rays recorded at the Pierre Auger Observatory. J. Cosmol. Astroparticle Phys. 2012;2012(4).http://dx.doi.org/10.1088/1475-7516/2012/04/040
