Artículo
Multitudinario:480 "Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter" (2010) Astroparticle Physics. 34(5):314-326
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Abstract:
Data collected by the Pierre Auger Observatory through 31 August 2007 showed evidence for anisotropy in the arrival directions of cosmic rays above the Greisen-Zatsepin-Kuz'min energy threshold, 6 × 10 19 eV. The anisotropy was measured by the fraction of arrival directions that are less than 3.1° from the position of an active galactic nucleus within 75 Mpc (using the Véron-Cetty and Véron 12th catalog). An updated measurement of this fraction is reported here using the arrival directions of cosmic rays recorded above the same energy threshold through 31 December 2009. The number of arrival directions has increased from 27 to 69, allowing a more precise measurement. The correlating fraction is 38-6+7%, compared with 21% expected for isotropic cosmic rays. This is down from the early estimate of 69-13+11%. The enlarged set of arrival directions is examined also in relation to other populations of nearby extragalactic objects: galaxies in the 2 Microns All Sky Survey and active galactic nuclei detected in hard X-rays by the Swift Burst Alert Telescope. A celestial region around the position of the radiogalaxy Cen A has the largest excess of arrival directions relative to isotropic expectations. The 2-point autocorrelation function is shown for the enlarged set of arrival directions and compared to the isotropic expectation. © 2010 Elsevier B.V. All rights reserved.
Registro:
| Documento: | Artículo |
| Título: | Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter |
| Autor: | Multitudinario:480 |
| Filiación: | Centro Atómico Bariloche, Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina Centro Atómico Constituyentes, Buenos Aires, Argentina Centro de Investigaciones en Láseres y Aplicaciones, CITEFA and CONICET, Argentina Departamento de Física, FCEyN, Universidad de Buenos Aires y CONICET, Argentina IFLP, Universidad Nacional de la Plata and CONICET, La Plata, Argentina Instituto de Astronomía y Física Del Espacio (CONICET-UBA), Buenos Aires, Argentina National Technological University, Faculty Mendoza (CONICET/CNEA), Mendoza, Argentina Pierre Auger Southern Observatory, Malargüe, Argentina Pierre Auger Southern Observatory, Comisión Nacional de Energía Atómica, Malargüe, Argentina University of Adelaide, Adelaide, SA, Australia Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, RJ, Brazil Pontifícia Universidade Católica, Rio de Janeiro, RJ, Brazil Universidade de São Paulo, Instituto de Física, São Carlos, SP, Brazil Universidade de São Paulo, Instituto de Física, São Paulo, SP, Brazil Universidade Estadual de Campinas, IFGW, Campinas, SP, Brazil Universidade Estadual de Feira de Santana, Brazil Universidade Estadual Do Sudoeste da Bahia, Vitoria da Conquista, BA, Brazil Universidade Federal da Bahia, Salvador, BA, Brazil Universidade Federal Do ABC, Santo André, SP, Brazil Universidade Federal Do Rio de Janeiro, Instituto de Física, Rio de Janeiro, RJ, Brazil Rudjer Bošković Institute, 10000 Zagreb, Croatia, 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 Palacký University, 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, CNRS-IN2P3, 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'Universit, INFN, Genova, Italy Universit dell'Aquila, INFN, L'Aquila, Italy Universit di Milano, Sezione INFN, Milan, Italy Dipartimento di Fisica Dell, Universit Del Salento and Sezione INFN, Lecce, Italy Universit di Napoli Federico, Sezione INFN, Napoli, Italy Universit di Roma II Tor Vergata, Sezione INFN, Roma, Italy Universit di Catania and Sezione INFN, Catania, Italy Universit di Torino and Sezione INFN, Torino, Italy Dipartimento di Ingegneria dell'Innovazione Dell', Universit Del Salento and Sezione INFN, Lecce, Italy Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo (INAF), Palermo, Italy Istituto di Fisica Dello Spazio Interplanetario (INAF), Universit di Torino and Sezione INFN, Torino, Italy INFN, Laboratori Nazionali Del Gran Sasso, Assergi (L'Aquila), Italy Universit di Palermo and Sezione INFN, Catania, 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, Morelia, Michoacan, Mexico Universidad Nacional Autonoma de Mexico, Mexico, Mexico IMAPP, Radboud University, Nijmegen, Netherlands Kernfysisch Versneller Instituut, University of Groningen, Groningen, Netherlands NIKHEF, Amsterdam, Netherlands ASTRON, Dwingeloo, Netherlands Institute of Nuclear Physics PAN, Krakow, Poland University of Łódź, Łódź, Poland LIP and Instituto Superior Técnico, Lisboa, Portugal J. Stefan Institute, Ljubljana, Slovenia Laboratory for Astroparticle Physics, University of Nova Gorica, Slovenia Instituto de Física Corpuscular, CSIC-Universitat de Valncia, Valencia, Spain 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, 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 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 California, Los Angeles, CA, 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 Caltech, Pasadena, United States Konan University, Kobe, Japan |
| Palabras clave: | Anisotropy; Cosmic rays; Extra-galactic; GZK; Pierre Auger Observatory; UHECR; Anisotropy; Augers; Autocorrelation; Cosmic ray measurement; Cosmology; Galaxies; Observatories; X rays; Active galactic nuclei; Autocorrelation functions; Burst alert telescopes; Extra-galactic; Extragalactic objects; Pierre Auger observatory; Precise measurements; UHECR; Cosmic rays |
| Año: | 2010 |
| Volumen: | 34 |
| Número: | 5 |
| Página de inicio: | 314 |
| Página de fin: | 326 |
| DOI: | http://dx.doi.org/10.1016/j.astropartphys.2010.08.010 |
| Título revista: | Astroparticle Physics |
| Título revista abreviado: | Astropart. Phys. |
| ISSN: | 09276505 |
| CODEN: | APHYE |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09276505_v34_n5_p314_Multitudinario |
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Citas:
---------- APA ----------
(2010) . Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter. Astroparticle Physics, 34(5), 314-326.http://dx.doi.org/10.1016/j.astropartphys.2010.08.010
---------- CHICAGO ----------
Multitudinario:480. "Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter" . Astroparticle Physics 34, no. 5 (2010) : 314-326.http://dx.doi.org/10.1016/j.astropartphys.2010.08.010
---------- MLA ----------
Multitudinario:480. "Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter" . Astroparticle Physics, vol. 34, no. 5, 2010, pp. 314-326.http://dx.doi.org/10.1016/j.astropartphys.2010.08.010
---------- VANCOUVER ----------
Multitudinario:480. Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter. Astropart. Phys. 2010;34(5):314-326.http://dx.doi.org/10.1016/j.astropartphys.2010.08.010
