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Measurement of the anisotropy of cosmic-ray arrival directions with icecube

  • R. Abbasi
  • , Y. Abdou
  • , T. Abu-Zayyad
  • , J. Adams
  • , J. A. Aguilar
  • , M. Ahlers
  • , K. Andeen
  • , Auffenberg.J.
  • , X. Bai
  • , M. Baker
  • , S. W. Barwick
  • , R. Bay
  • , J. L. Bazo Alba
  • , K. Beattie
  • , J. J. Beatty
  • , S. Bechet
  • , J. K. Becker
  • , K. H. Becker
  • , M. L. Benabderrahmane
  • , S. BenZvi
  • J. Berdermann, P. Berghaus, D. Berley, E. Bernardini, D. Bertrand, D. Z. Besson, M. Bissok, E. Blaufuss, D. J. Boersma, C. Bohm, S. Böser, O. Botner, L. Bradley, J. Braun, S. Buitink, M. Carson, D. Chirkin, B. Christy, J. Clem, F. Clevermann, S. Cohen, C. Colnard, D. F. Cowen, M. V. D'Agostino, M. Danninger, J. C. Davis, C. De Clercq, L. Demirörs, O. Depaepe, F. Descamps, P. Desiati, G. De Vries-Uiterweerd, T. DeYoung, J. C. Díaz-Vélez, M. Dierckxsens, J. Dreyer, J. P. Dumm, M. R. Duvoort, R. Ehrlich, J. Eisch, R. W. Ellsworth, O. Engdegård, S. Euler, P. A. Evenson, O. Fadiran, A. R. Fazely, T. Feusels, K. Filimonov, C. Finley, M. M. Foerster, B. D. Fox, A. Franckowiak, R. Franke, T. K. Gaisser, J. Gallagher, M. Geisler, L. Gerhardt, L. Gladstone, T. Glüsenkamp, A. Goldschmidt, J. A. Goodman, D. Grant, T. Griesel, A. Groß, S. Grullon, M. Gurtner, C. Ha, A. Hallgren, F. Halzen, K. Han, K. Hanson, K. Helbing, P. Herquet, S. Hickford, G. C. Hill, K. D. Hoffman, A. Homeier, K. Hoshina, D. Hubert, W. Huelsnitz, J. P. Hülß, P. O. Hulth, K. Hultqvist, S. Hussain, A. Ishihara, J. Jacobsen, G. S. Japaridze, H. Johansson, J. M. Joseph, K. H. Kampert, T. Karg, A. Karle, J. L. Kelley, N. Kemming, P. Kenny, J. Kiryluk, F. Kislat, S. R. Klein, S. Knops, J. H. Köhne, G. Kohnen, H. Kolanoski, L. Köpke, D. J. Koskinen, M. Kowalski, T. Kowarik, M. Krasberg, T. Krings, G. Kroll, K. Kuehn, T. Kuwabara, M. Labare, S. Lafebre, K. Laihem, H. Landsman, R. Lauer, R. Lehmann, D. Lennarz, J. Lünemann, J. Madsen, P. Majumdar, A. Marotta, R. Maruyama, K. Mase, H. S. Matis, M. Matusik, K. Meagher, M. Merck, P. Mészáros, T. Meures, E. Middell, N. Milke, J. Miller, T. Montaruli, R. Morse, S. M. Movit, R. Nahnhauer, J. W. Nam, U. Naumann, P. Nießen, D. R. Nygren, S. Odrowski, A. Olivas, M. Olivo, A. O'Murchadha, M. Ono, S. Panknin, L. Paul, C. Pérez de los Heros, J. Petrovic, A. Piegsa, D. Pieloth, R. Porrata, J. Posselt, P. B. Price, M. Prikockis, G. T. Przybylski, K. Rawlins, P. Redl, E. Resconi, W. Rhode, M. Ribordy, A. Rizzo, J. P. Rodrigues, P. Roth, F. Rothmaier, C. Rott, C. Roucelle, T. Ruhe, D. Rutledge, B. Ruzybayev, D. Ryckbosch, H. G. Sander, M. Santander, S. Sarkar, K. Schatto, S. Schlenstedt, T. Schmidt, A. Schukraft, A. Schultes, O. Schulz, M. Schunck, D. Seckel, B. Semburg, S. H. Seo, Y. Sestayo, S. Seunarine, A. Silvestri, A. Slipak, G. M. Spiczak, C. Spiering, M. Stamatikos, T. Stanev, G. Stephens, T. Stezelberger, R. G. Stokstad, S. Stoyanov, E. A. Strahler, T. Straszheim, G. W. Sullivan, Q. Swillens, H. Taavola, I. Taboada, A. Tamburro, O. Tarasova, A. Tepe, S. Ter-Antonyan, S. Tilav, P. A. Toale, S. Toscano, D. Tosi, D. Turčan, N. Van Eijndhoven, J. Vandenbroucke, A. Van Overloop, J. Van Santen, M. Voge, B. Voigt, C. Walck, T. Waldenmaier, M. Wallraff, M. Walter, Ch Weaver, C. Wendt, S. Westerhoff, N. Whitehorn, K. Wiebe, C. H. Wiebusch, G. Wikström, D. R. Williams, R. Wischnewski, H. Wissing, M. Wolf, K. Woschnagg, C. Xu, X. W. Xu, G. Yodh, S. Yoshida, P. Zarzhitsky
  • University of Wisconsin-Madison
  • Ghent University
  • University of Wisconsin-River Falls
  • University of Canterbury
  • University of Oxford
  • University of Wuppertal
  • University of Delaware
  • University of California at Irvine
  • University of California at Berkeley
  • DESY
  • Lawrence Berkeley National Laboratory
  • Ohio State University
  • Université libre de Bruxelles
  • Ruhr-Universität Bochum
  • University of Maryland
  • University of Kansas
  • RWTH Aachen University
  • Oskar Klein Centre
  • Rheinische Friedrich-Wilhelms-Universität Bonn
  • Uppsala University
  • Pennsylvania State University
  • TU Dortmund University
  • Icole Polytechnique Fédérale
  • Max Planck Institute for Nuclear Physics
  • Vrije Universiteit Brussel
  • Institute for Subatomic Physics of Utrecht University
  • Clark Atlanta University
  • Southern University and A&M College
  • University of Alberta
  • Johannes Gutenberg University Mainz
  • Université de Mons
  • Chiba University
  • Humboldt-Universität zu Berlin
  • Dipartimento Interateneo di Fisica ‘M. Merlin’
  • University of Alaska Anchorage
  • University of the West Indies
  • NASA Goddard Space Flight Center
  • Georgia Institute of Technology
  • Department of Physics and Astronomy

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152 Citas (Scopus)

Resumen

We report the first observation of an anisotropy in the arrival direction of cosmic rays with energies in the multi-TeV region in theSouthern sky using data from the IceCube detector. Between 2007 June and 2008 March, the partially deployed IceCube detector was operated in a configuration with 1320 digital optical sensors distributed over22 strings at depths between 1450 and 2450 m inside the Antarctic ice. IceCube is a neutrino detector, but the data are dominated by a large background of cosmic-ray muons. Therefore, the background data aresuitable for high-statistics studies of cosmic rays in the southern sky. The data include 4.3 billion muons produced by downward-going cosmic-ray interactions in the atmosphere; these events were reconstructed with a median angular resolution of 3° and a median energy of ∼20 TeV. Their arrival direction distribution exhibits an anisotropy in right ascension with a first-harmonic amplitude of (6.4±0.2 stat.±0.8 syst.) × 10-4.

Idioma originalInglés
Páginas (desde-hasta)L194-L198
PublicaciónAstrophysical Journal Letters
Volumen718
N.º2 PART 2
DOI
EstadoPublicada - 1 ago. 2010
Publicado de forma externa

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