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Evidence for a Supergalactic Structure of Magnetic Deflection Multiplets of Ultra-high-energy Cosmic Rays

Title
Evidence for a Supergalactic Structure of Magnetic Deflection Multiplets of Ultra-high-energy Cosmic Rays
Authors
Abbasi, R. U.Abe, M.Abu-Zayyad, T.Allen, M.Azuma, R.Barcikowski, E.Belz, J. W.Bergman, D. R.Blake, S. A.Cady, R.Cheon, B. G.Chiba, J.Chikawa, M.di Matteo, A.Fujii, T.Fujisue, K.Fujita, K.Fujiwara, R.Fukushima, M.Furlich, G.Hanlon, W.Hayashi, M.Hayashida, N.Hibino, K.Higuchi, R.Honda, K.Ikeda, D.Inadomi, T.Inoue, N.Ishii, T.Ishimori, R.Ito, H.Ivanov, D.Iwakura, H.Jeong, H. M.Jeong, S.Jui, C. C. H.Kadota, K.Kakimoto, F.Kalashev, O.Kasahara, K.Kasami, S.Kawai, H.Kawakami, S.Kawana, S.Kawata, K.Kido, E.Kim, H. B.Kim, J. H.Kim, M. H.Kim, S. W.Kishigami, S.Kuzmin, VKuznetsov, M.Kwon, Y. J.Lee, K. H.Lubsandorzhiev, B.Lundquist, J. P.Machida, K.Matsumiya, H.Matsuyama, T.Matthews, J. N.Mayta, R.Minamino, M.Mukai, K.Myers, INagataki, S.Nakai, K.Nakamura, R.Nakamura, T.Nakamura, Y.Nonaka, T.Oda, H.Ogio, S.Ohnishi, M.Ohoka, H.Oku, Y.Okuda, T.Omura, Y.Ono, M.Onogi, R.Oshima, A.Ozawa, S.Park, I. H.Pshirkov, M. S.Remington, J.Rodriguez, D. C.Rubtsov, G.Ryu, D.Sagawa, H.Sahara, R.Saito, Y.Sakaki, N.Sako, T.Sakurai, N.Sano, K.Seki, T.Sekino, K.Shah, P. D.Shibata, F.Shibata, T.Shimodaira, H.Shin, B. K.Shin, H. S.Smith, J. D.Sokolsky, P.Sone, N.Stokes, B. T.Stroman, T. A.Suzawa, T.Takagi, Y.Takahashi, Y.Takamura, M.Takeishi, R.Taketa, A.Takita, M.Tameda, Y.Tanaka, H.Tanaka, K.Tanaka, M.Tanoue, Y.Thomas, S. B.Thomson, G. B.Tinyakov, P.Tkachev, ITokuno, H.Tomida, T.Troitsky, S.Tsunesada, Y.Uchihori, Y.Udo, S.Uehama, T.Urban, F.Wong, T.Yada, K.Yamamoto, M.Yamazaki, K.Yang, J.Yashiro, K.Yosei, M.Zhezher, Y.Zundel, Z.
Ewha Authors
양종만
SCOPUS Author ID
양종만scopusscopus
Issue Date
2020
Journal Title
ASTROPHYSICAL JOURNAL
ISSN
0004-637XJCR Link

1538-4357JCR Link
Citation
ASTROPHYSICAL JOURNAL vol. 899, no. 1
Keywords
Extragalactic magnetic fieldsUltra-high-energy cosmic radiationCosmic raysHigh energy astrophysicsAstrophysical magnetismCosmic ray astronomyCosmic ray sources
Publisher
IOP PUBLISHING LTD
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
Evidence for a large-scale supergalactic cosmic-ray multiplet (arrival directions correlated with energy) structure is reported for ultra-high-energy cosmic-ray (UHECR) energies above 10(19) eV using 7 years of data from the Telescope Array (TA) surface detector and updated to 10 years. Previous energy-position correlation studies have made assumptions regarding magnetic field shapes and strength, and UHECR composition. Here the assumption tested is that, because the supergalactic plane is a fit to the average matter density of the local large-scale structure, UHECR sources and intervening extragalactic magnetic fields are correlated with this plane. This supergalactic deflection hypothesis is tested by the entire field-of-view (FOV) behavior of the strength of intermediate-scale energy-angle correlations. These multiplets are measured in spherical cap section bins (wedges) of the FOV to account for coherent and random magnetic fields. The structure found is consistent with supergalactic deflection, the previously published energy spectrum anisotropy results of the TA (the Hotspot and Coldspot), and toy-model simulations of a supergalactic magnetic sheet. The seven year data posttrial significance of this supergalactic structure of multiplets appearing by chance, on an isotropic sky, is found by Monte Carlo simulation to be 4.2 sigma. The 10 years of data posttrial significance is 4.1 sigma. Furthermore, the starburst galaxy M82 is shown to be a possible source of the TA Hotspot, and an estimate of the supergalactic magnetic field using UHECR measurements is presented.
DOI
10.3847/1538-4357/aba26c
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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