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Ryu, Dongsu
Astrophysics Lab
Research Interests
  • Shock waves and turbulence in clusters of galaxies

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CORRELATIONS OF THE ARRIVAL DIRECTIONS OF ULTRA-HIGH ENERGY COSMIC RAYS WITH EXTRAGALACTIC OBJECTS AS OBSERVED BY THE TELESCOPE ARRAY EXPERIMENT

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Title
CORRELATIONS OF THE ARRIVAL DIRECTIONS OF ULTRA-HIGH ENERGY COSMIC RAYS WITH EXTRAGALACTIC OBJECTS AS OBSERVED BY THE TELESCOPE ARRAY EXPERIMENT
Author
Abu-Zayyad, T.Aida, R.Allen, M.Anderson, R.Azuma, R.Barcikowski, E.Belz, J. W.Bergman, D. R.Blake, S. A.Cady, R.Cheon, B. G.Chiba, J.Chikawa, M.Cho, E. J.Cho, W. R.Fujii, H.Fujii, T.Fukuda, T.Fukushima, M.Hanlon, W.Hayashi, K.Hayashi, Y.Hayashida, N.Hibino, K.Hiyama, K.Honda, K.Iguchi, T.Ikeda, D.Ikuta, K.Inoue, N.Ishii, T.Ishimori, R.Ito, H.Ivanov, D.Iwamoto, S.Jui, C. C. H.Kadota, K.Kakimoto, F.Kalashev, O.Kanbe, T.Kasahara, K.Kawai, H.Kawakami, S.Kawana, S.Kawata, K.Kido, E.Kim, H. B.Kim, H. K.Kim, J. H.Kim, J. H.Kitamoto, K.Kitamura, S.Kitamura, Y.Kobayashi, K.Kobayashi, Y.Kondo, Y.Kuramoto, K.Kuzmin, V.Kwon, Y. J.Lan, J.Lim, S. I.Lundquist, J. P.Machida, S.Martens, K.Matsuda, T.Matsuura, T.Matsuyama, T.Matthews, J. N.Minamino, M.Miyata, K.Murano, Y.Myers, I.Nagasawa, K.Nagataki, S.Nakamura, T.Nam, S. W.Nonaka, T.Ogio, S.Ohnishi, M.Ohoka, H.Oki, K.Oku, D.Okuda, T.Ono, M.Oshima, A.Ozawa, S.Park, I. H.Pshirkov, M. S.Rodriguez, D. C.Roh, S. Y.Rubtsov, G.Ryu, DongsuSagawa, H.Sakurai, N.Sampson, A. L.Scott, L. M.Shah, P. D.Shibata, F.Shibata, T.Shimodaira, H.Shin, B. K.Shin, J. I.Shirahama, T.Smith, J. D.Sokolsky, P.Springer, R. W.Stokes, B. T.Stratton, S. R.Stroman, T.Suzuki, S.Takahashi, Y.Takeda, M.Taketa, A.Takita, M.Tameda, Y.Tanaka, H.Tanaka, K.Tanaka, M.Thomas, S. B.Thomson, G. B.Tinyakov, P.Tkachev, I.Tokuno, H.Tomida, T.Troitsky, S.Tsunesada, Y.Tsutsumi, K.Tsuyuguchi, Y.Uchihori, Y.Udo, S.Ukai, H.Urban, F.Vasiloff, G.Wada, Y.Wong, T.Yamakawa, Y.Yamane, R.Yamaoka, H.Yamazaki, K.Yang, J.Yoneda, Y.Yoshida, S.Yoshii, H.Zhou, X.Zollinger, R.Zundel, Z.
Keywords
acceleration of particles; astroparticle physics; cosmic rays
Issue Date
201311
Publisher
IOP PUBLISHING LTD
Citation
ASTROPHYSICAL JOURNAL, v.777, no.2, pp.1 - 8
Abstract
We search for correlations between the positions of extragalactic objects and the arrival directions of ultra-high energy cosmic rays (UHECRs) with primary energy E ≥ 40 EeV as observed by the surface detector array of the Telescope Array (TA) experiment during the first 40 months of operation. We examine several public astronomical object catalogs, including the Veron-Cetty and Veron catalog of active galactic nuclei. We count the number of TA events correlated with objects in each catalog as a function of three parameters: the maximum angular separation between a TA event and an object, the minimum energy of the events, and the maximum redshift of the objects. We determine the combination of these parameters that maximizes the correlations, and we calculate the probability of having the same levels of correlations from an isotropic distribution of UHECR arrival directions. No statistically significant correlations are found when penalties for scanning over the above parameters and for searching in several catalogs are taken into account.
URI
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DOI
http://dx.doi.org/10.1088/0004-637X/777/2/88
ISSN
0004-637X
Appears in Collections:
SNS_Journal Papers
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