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Observation of anisotropy in the arrival directions of galactic cosmic rays at multiple angular scales with IceCube
- Abbasi, R. (author)
- Abdou, Y. (author)
- Abu-Zayyad, T. (author)
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- Adams, J. (author)
- Aguilar, J. A. (author)
- Ahlers, M. (author)
- Altmann, D. (author)
- Andeen, K. (author)
- Auffenberg, J. (author)
- Bai, X. (author)
- Baker, M. (author)
- Barwick, S. W. (author)
- Bay, R. (author)
- Alba, J. L. Bazo (author)
- Beattie, K. (author)
- Beatty, J. J. (author)
- Bechet, S. (author)
- Becker, J. K. (author)
- Benabderrahmane, M. L. (author)
- BenZvi, S. (author)
- Berdermann, J. (author)
- Berghaus, P. (author)
- Berley, D. (author)
- Bernardini, E. (author)
- Bertrand, D. (author)
- Besson, D. Z. (author)
- Bindig, D. (author)
- Bissok, M. (author)
- Blaufuss, E. (author)
- Blumenthal, J. (author)
- Boersma, D. J. (author)
- Bose, D. (author)
- Boeser, S. (author)
- Brown, A. M. (author)
- Buitink, S. (author)
- Caballero-Mora, K. S. (author)
- Carson, M. (author)
- Chirkin, D. (author)
- Christy, B. (author)
- Clem, J. (author)
- Clevermann, F. (author)
- Cohen, S. (author)
- Colnard, C. (author)
- Cowen, D. F. (author)
- Danninger, M. (author)
- Daughhetee, J. (author)
- Davis, J. C. (author)
- De Clercq, C. (author)
- Demiroers, L. (author)
- Denger, T. (author)
- Depaepe, O. (author)
- Descamps, F. (author)
- Desiati, P. (author)
- de Vries-Uiterweerd, G. (author)
- DeYoung, T. (author)
- Diaz-Velez, J. C. (author)
- Dierckxsens, M. (author)
- Dreyer, J. (author)
- Dumm, J. P. (author)
- Ehrlich, R. (author)
- Eisch, J. (author)
- Ellsworth, R. W. (author)
- Euler, S. (author)
- Evenson, P. A. (author)
- Fadiran, O. (author)
- Fazely, A. R. (author)
- Fedynitch, A. (author)
- Feintzeig, J. (author)
- Feusels, T. (author)
- Filimonov, K. (author)
- Fischer-Wasels, T. (author)
- Foerster, M. M. (author)
- Fox, B. D. (author)
- Franckowiak, A. (author)
- Franke, R. (author)
- Gaisser, T. K. (author)
- Gallagher, J. (author)
- Gerhardt, L. (author)
- Gladstone, L. (author)
- Gluesenkamp, T. (author)
- Goldschmidt, A. (author)
- Goodman, J. A. (author)
- Gora, D. (author)
- Grant, D. (author)
- Griesel, T. (author)
- Gross, A. (author)
- Grullon, S. (author)
- Gurtner, M. (author)
- Ha, C. (author)
- Hajismail, A. (author)
- Halzen, F. (author)
- Han, K. (author)
- Hanson, K. (author)
- Heinen, D. (author)
- Helbing, K. (author)
- Herquet, P. (author)
- Hickford, S. (author)
- Hill, G. C. (author)
- Hoffman, K. D. (author)
- Homeier, A. (author)
- Hoshina, K. (author)
- Hubert, D. (author)
- Huelsnitz, W. (author)
- Huelss, J. -P (author)
- Hultqvist, K. (author)
- Hussain, S. (author)
- Ishihara, A. (author)
- Jacobsen, J. (author)
- Japaridze, G. S. (author)
- Kampert, K. -H (author)
- Kappes, A. (author)
- Karg, T. (author)
- Karle, A. (author)
- Kenny, P. (author)
- Kiryluk, J. (author)
- Kislat, F. (author)
- Klein, S. R. (author)
- Koehne, J. -H (author)
- Kohnen, G. (author)
- Kolanoski, H. (author)
- Koepke, L. (author)
- Kopper, S. (author)
- Koskinen, D. J. (author)
- Kowalski, M. (author)
- Kowarik, T. (author)
- Krasberg, M. (author)
- Krings, T. (author)
- Kroll, G. (author)
- Kurahashi, N. (author)
- Kuwabara, T. (author)
- Labare, M. (author)
- Lafebre, S. (author)
- Laihem, K. (author)
- Landsman, H. (author)
- Larson, M. J. (author)
- Lauer, R. (author)
- Luenemann, J. (author)
- Madajczyk, B. (author)
- Madsen, J. (author)
- Majumdar, P. (author)
- Marotta, A. (author)
- Maruyama, R. (author)
- Mase, K. (author)
- Matis, H. S. (author)
- Meagher, K. (author)
- Merck, M. (author)
- Meszaros, P. (author)
- Meures, T. (author)
- Middell, E. (author)
- Milke, N. (author)
- Montaruli, T. (author)
- Morse, R. (author)
- Movit, S. M. (author)
- Nahnhauer, R. (author)
- Nam, J. W. (author)
- Naumann, U. (author)
- Niessen, P. (author)
- Nygren, D. R. (author)
- Odrowski, S. (author)
- Olivas, A. (author)
- Olivo, M. (author)
- O'Murchadha, A. (author)
- Ono, M. (author)
- Panknin, S. (author)
- Paul, L. (author)
- Petrovic, J. (author)
- Piegsa, A. (author)
- Pieloth, D. (author)
- Porrata, R. (author)
- Posselt, J. (author)
- Price, C. C. (author)
- Price, P. B. (author)
- Przybylski, G. T. (author)
- Rawlins, K. (author)
- Redl, P. (author)
- Resconi, E. (author)
- Rhode, W. (author)
- Ribordy, M. (author)
- Rizzo, A. (author)
- Rodrigues, J. P. (author)
- Roth, P. (author)
- Rothmaier, F. (author)
- Rott, C. (author)
- Ruhe, T. (author)
- Rutledge, D. (author)
- Ruzybayev, B. (author)
- Ryckbosch, D. (author)
- Sander, H. -G (author)
- Santander, M. (author)
- Sarkar, S. (author)
- Schatto, K. (author)
- Schmidt, T. (author)
- Schoenwald, A. (author)
- Schukraft, A. (author)
- Schultes, A. (author)
- Schulz, O. (author)
- Schunck, M. (author)
- Seckel, D. (author)
- Semburg, B. (author)
- Sestayo, Y. (author)
- Seunarine, S. (author)
- Silvestri, A. (author)
- Slipak, A. (author)
- Spiczak, G. M. (author)
- Spiering, C. (author)
- Stamatikos, M. (author)
- Stanev, T. (author)
- Stephens, G. (author)
- Stezelberger, T. (author)
- Stokstad, R. G. (author)
- Stoessl, A. (author)
- Stoyanov, S. (author)
- Strahler, E. A. (author)
- Straszheim, T. (author)
- Stuer, M. (author)
- Sullivan, G. W. (author)
- Swillens, Q. (author)
- Taboada, I. (author)
- Tamburro, A. (author)
- Tepe, A. (author)
- Ter-Antonyan, S. (author)
- Tilav, S. (author)
- Toale, P. A. (author)
- Toscano, S. (author)
- Tosi, D. (author)
- Turcan, D. (author)
- van Eijndhoven, N. (author)
- Vandenbroucke, J. (author)
- Van Overloop, A. (author)
- van Santen, J. (author)
- Vehring, M. (author)
- Voge, M. (author)
- Waldenmaier, T. (author)
- Wallraff, M. (author)
- Walter, M. (author)
- Weaver, Ch. (author)
- Wendt, C. (author)
- Westerhoff, S. (author)
- Whitehorn, N. (author)
- Wiebe, K. (author)
- Wiebusch, C. H. (author)
- Williams, D. R. (author)
- Wischnewski, R. (author)
- Wissing, H. (author)
- Wolf, M. (author)
- Wood, T. R. (author)
- Woschnagg, K. (author)
- Xu, C. (author)
- Xu, X. W. (author)
- Yodh, G. (author)
- Yoshida, S. (author)
- Zarzhitsky, P. (author)
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- (creator_code:org_t)
- 2011
- 2011
- English.
- In: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 740:1, s. 16-
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Between 2009 May and 2010 May, the IceCube neutrino detector at the South Pole recorded 32 billion muons generated in air showers produced by cosmic rays with a median energy of 20 TeV. With a data set of this size, it is possible to probe the southern sky for per-mil anisotropy on all angular scales in the arrival direction distribution of cosmic rays. Applying a power spectrum analysis to the relative intensity map of the cosmic ray flux in the southern hemisphere, we show that the arrival direction distribution is not isotropic, but shows significant structure on several angular scales. In addition to previously reported large-scale structure in the form of a strong dipole and quadrupole, the data show small-scale structure on scales between 15 degrees and 30 degrees. The skymap exhibits several localized regions of significant excess and deficit in cosmic ray intensity. The relative intensity of the smaller-scale structures is about a factor of five weaker than that of the dipole and quadrupole structure. The most significant structure, an excess localized at (right ascension alpha = 122 degrees.4 and declination d = -47 degrees.4), extends over at least 20 degrees in right ascension and has a post-trials significance of 5.3 sigma. The origin of this anisotropy is still unknown.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Subatomär fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Subatomic Physics (hsv//eng)
Keyword
- astroparticle physics
- cosmic rays
- fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Abbasi, R.
- Abdou, Y.
- Abu-Zayyad, T.
- Adams, J.
- Aguilar, J. A.
- Ahlers, M.
- show more...
- Altmann, D.
- Andeen, K.
- Auffenberg, J.
- Bai, X.
- Baker, M.
- Barwick, S. W.
- Bay, R.
- Alba, J. L. Bazo
- Beattie, K.
- Beatty, J. J.
- Bechet, S.
- Becker, J. K.
- Hultqvist, Klas
- Benabderrahmane, ...
- BenZvi, S.
- Berdermann, J.
- Berghaus, P.
- Berley, D.
- Bernardini, E.
- Bertrand, D.
- Besson, D. Z.
- Bindig, D.
- Bissok, M.
- Blaufuss, E.
- Blumenthal, J.
- Boersma, D. J.
- Bohm, Christian
- Bose, D.
- Boeser, S.
- Botner, Olga
- Brown, A. M.
- Buitink, S.
- Caballero-Mora, ...
- Carson, M.
- Chirkin, D.
- Christy, B.
- Clem, J.
- Clevermann, F.
- Cohen, S.
- Colnard, C.
- Cowen, D. F.
- Danninger, Matth ...
- Danninger, M.
- Daughhetee, J.
- Davis, J. C.
- De Clercq, C.
- Demiroers, L.
- Denger, T.
- Depaepe, O.
- Descamps, F.
- Desiati, P.
- de Vries-Uiterwe ...
- DeYoung, T.
- Diaz-Velez, J. C ...
- Dierckxsens, M.
- Dreyer, J.
- Dumm, J. P.
- Ehrlich, R.
- Eisch, J.
- Ellsworth, R. W.
- Engdegård, Olle
- Euler, S.
- Evenson, P. A.
- Fadiran, O.
- Fazely, A. R.
- Fedynitch, A.
- Feintzeig, J.
- Feusels, T.
- Filimonov, K.
- Finley, Chad
- Fischer-Wasels, ...
- Foerster, M. M.
- Fox, B. D.
- Franckowiak, A.
- Franke, R.
- Gaisser, T. K.
- Gallagher, J.
- Gerhardt, L.
- Gladstone, L.
- Gluesenkamp, T.
- Goldschmidt, A.
- Goodman, J. A.
- Gora, D.
- Grant, D.
- Griesel, T.
- Gross, A.
- Grullon, S.
- Gurtner, M.
- Ha, C.
- Hajismail, A.
- Hallgren, Allan
- Halzen, F.
- Han, K.
- Hanson, K.
- Heinen, D.
- Helbing, K.
- Herquet, P.
- Hickford, S.
- Hill, G. C.
- Hoffman, K. D.
- Homeier, A.
- Hoshina, K.
- Hubert, D.
- Huelsnitz, W.
- Huelss, J. -P
- Hulth, Per Olof
- Hultqvist, K.
- Hussain, S.
- Ishihara, A.
- Jacobsen, J.
- Japaridze, G. S.
- Johansson, Henri ...
- Miller, Jonathan
- Kampert, K. -H
- Kappes, A.
- Karg, T.
- Karle, A.
- Kenny, P.
- Kiryluk, J.
- Kislat, F.
- Klein, S. R.
- Koehne, J. -H
- Kohnen, G.
- Kolanoski, H.
- Koepke, L.
- Kopper, S.
- Koskinen, D. J.
- Kowalski, M.
- Kowarik, T.
- Krasberg, M.
- Krings, T.
- Kroll, G.
- Kurahashi, N.
- Kuwabara, T.
- Labare, M.
- Lafebre, S.
- Laihem, K.
- Landsman, H.
- Larson, M. J.
- Lauer, R.
- Luenemann, J.
- Madajczyk, B.
- Madsen, J.
- Majumdar, P.
- Marotta, A.
- Maruyama, R.
- Mase, K.
- Matis, H. S.
- Meagher, K.
- Merck, M.
- Meszaros, P.
- Meures, T.
- Middell, E.
- Milke, N.
- Montaruli, T.
- Morse, R.
- Movit, S. M.
- Nahnhauer, R.
- Nam, J. W.
- Naumann, U.
- Niessen, P.
- Nygren, D. R.
- Odrowski, S.
- Olivas, A.
- Olivo, M.
- O'Murchadha, A.
- Ono, M.
- Panknin, S.
- Paul, L.
- de los Heros, Ca ...
- Petrovic, J.
- Piegsa, A.
- Pieloth, D.
- Porrata, R.
- Posselt, J.
- Price, C. C.
- Price, P. B.
- Przybylski, G. T ...
- Rawlins, K.
- Redl, P.
- Resconi, E.
- Rhode, W.
- Ribordy, M.
- Rizzo, A.
- Rodrigues, J. P.
- Roth, P.
- Rothmaier, F.
- Rott, C.
- Ruhe, T.
- Rutledge, D.
- Ruzybayev, B.
- Ryckbosch, D.
- Sander, H. -G
- Santander, M.
- Sarkar, S.
- Schatto, K.
- Schmidt, T.
- Schoenwald, A.
- Schukraft, A.
- Schultes, A.
- Schulz, O.
- Schunck, M.
- Seckel, D.
- Semburg, B.
- Seo, Seon-Hee
- Sestayo, Y.
- Seunarine, S.
- Silvestri, A.
- Slipak, A.
- Spiczak, G. M.
- Spiering, C.
- Stamatikos, M.
- Stanev, T.
- Stephens, G.
- Stezelberger, T.
- Stokstad, R. G.
- Stoessl, A.
- Stoyanov, S.
- Strahler, E. A.
- Straszheim, T.
- Stuer, M.
- Sullivan, G. W.
- Swillens, Q.
- Taavola, Henric
- Taboada, I.
- Tamburro, A.
- Tepe, A.
- Ter-Antonyan, S.
- Tilav, S.
- Toale, P. A.
- Toscano, S.
- Tosi, D.
- Turcan, D.
- van Eijndhoven, ...
- Vandenbroucke, J ...
- Van Overloop, A.
- van Santen, J.
- Vehring, M.
- Voge, M.
- Walck, Christian
- Waldenmaier, T.
- Wallraff, M.
- Walter, M.
- Weaver, Ch.
- Wendt, C.
- Westerhoff, S.
- Whitehorn, N.
- Wiebe, K.
- Wiebusch, C. H.
- Williams, D. R.
- Wischnewski, R.
- Wissing, H.
- Wolf, M.
- Wood, T. R.
- Woschnagg, K.
- Xu, C.
- Xu, X. W.
- Yodh, G.
- Yoshida, S.
- Zarzhitsky, P.
- Zoll, Marcel
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