Northern Sky Galactic Cosmic Ray Anisotropy between 10 and 1000 TeV with the Tibet Air Shower Array
Amenomori,M.1; Bi,X. J.2; Chen,D.3; Chen,T. L.4; Chen,W. Y.2; Cui,S. W.5; Danzengluobu,4; Ding,L. K.2; Feng,C. F.6; Feng,Zhaoyang2; Feng,Z. Y.7; Gou,Q. B.2; Guo,Y. Q.2; He,H. H.2; He,Z. T.5; Hibino,K.8; Hotta,N.9; Hu,Haibing4; Hu,H. B.2; Huang,J.2; Jia,H. Y.7; Jiang,L.2; Kajino,F.10; Kasahara,K.11; Katayose,Y.12; Kato,C.13; Kawata,K.14; Kozai,M.13; Labaciren,4; Le,G. M.15; Li,A. F.2,6,16; Li,H. J.4; Li,W. J.2,7; Liu,C.2; Liu,J. S.2; Liu,M. Y.4; Lu,H.2; Meng,X. R.4; Miyazaki,T.13; Mizutani,K.11,17; Munakata,K.13; Nakajima,T.13; Nakamura,Y.13; Nanjo,H.1; Nishizawa,M.18; Niwa,T.13; Ohnishi,M.14; Ohta,I.19; Ozawa,S.11; Qian,X. L.2,6; Qu,X. B.2; Saito,T.20; Saito,T. Y.21; Sakata,M.10; Sako,T. K.14; Shao,J.2,6; Shibata,M.12; Shiomi,A.22; Shirai,T.8; Sugimoto,H.23; Takita,M.14; Tan,Y. H.2; Tateyama,N.8; Torii,S.11; Tsuchiya,H.24; Udo,S.8; Wang,H.2; Wu,H. R.2; Xue,L.6; Yamamoto,Y.10; Yamauchi,K.12; Yang,Z.2; Yuan,A. F.4; Yuda,T.14; Zhai,L. M.3; Zhang,H. M.2; Zhang,J. L.2; Zhang,X. Y.6; Zhang,Y.2; Zhang,Yi2; Zhang,Ying2; Zhaxisangzhu,4; Zhou,X. X.7
Source PublicationThe Astrophysical Journal
AbstractAbstract We report on the analysis of the 10–1000 TeV large-scale sidereal anisotropy of Galactic cosmic rays (GCRs) with the data collected by the Tibet Air Shower Array from 1995 October to 2010 February. In this analysis, we improve the energy estimate and extend the decl. range down to ?30°. We find that the anisotropy maps above 100 TeV are distinct from that at a multi-TeV band. The so-called tail-in and loss-cone features identified at low energies get less significant, and a new component appears at ~100 TeV. The spatial distribution of the GCR intensity with an excess (7.2σ pre-trial, 5.2σ post-trial) and a deficit (?5.8σ pre-trial) are observed in the 300 TeV anisotropy map, in close agreement with IceCube’s results at 400 TeV. Combining the Tibet results in the northern sky with IceCube’s results in the southern sky, we establish a full-sky picture of the anisotropy in hundreds of TeV band. We further find that the amplitude of the first order anisotropy increases sharply above ~100 TeV, indicating a new component of the anisotropy. All these results may shed new light on understanding the origin and propagation of GCRs.
Keywordastroparticle physics cosmic rays
WOS IDIOP:0004-637X-836-2-153
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Department of Physics, Hirosaki University, Hirosaki 036-8561, Japan
2.Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
3.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
4.Department of Mathematics and Physics, Tibet University, Lhasa 850000, China
5.Department of Physics, Hebei Normal University, Shijiazhuang 050016, China
6.Department of Physics, Shandong University, Jinan 250100, China
7.Institute of Modern Physics, Southwest Jiaotong University, Chengdu 610031, China
8.Faculty of Engineering, Kanagawa University, Yokohama 221-8686, Japan
9.Faculty of Education, Utsunomiya University, Utsunomiya 321-8505, Japan
10.Department of Physics, Konan University, Kobe 658-8501, Japan
11.Research Institute for Science and Engineering, Waseda University, Tokyo 169-8555, Japan
12.Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan
13.Department of Physics, Shinshu University, Matsumoto 390-8621, Japan
14.Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan
15.National Center for Space Weather, China Meteorological Administration, Beijing 100081, China
16.School of Information Science and Engineering, Shandong Agriculture University, Taian 271018, China
17.Saitama University, Saitama 338-8570, Japan
18.National Institute of Informatics, Tokyo 101-8430, Japan
19.Sakushin Gakuin University, Utsunomiya 321-3295, Japan
20.Tokyo Metropolitan College of Industrial Technology, Tokyo 116-8523, Japan
21.Max-Planck-Institut für Physik, München D-80805, Deutschland
22.College of Industrial Technology, Nihon University, Narashino 275-8576, Japan
23.Shonan Institute of Technology, Fujisawa 251-8511, Japan
24.Japan Atomic Energy Agency, Tokai-mura 319-1195, Japan
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GB/T 7714
Amenomori,M.,Bi,X. J.,Chen,D.,et al. Northern Sky Galactic Cosmic Ray Anisotropy between 10 and 1000 TeV with the Tibet Air Shower Array[J]. The Astrophysical Journal,2017,836(2).
APA Amenomori,M..,Bi,X. J..,Chen,D..,Chen,T. L..,Chen,W. Y..,...&Zhou,X. X..(2017).Northern Sky Galactic Cosmic Ray Anisotropy between 10 and 1000 TeV with the Tibet Air Shower Array.The Astrophysical Journal,836(2).
MLA Amenomori,M.,et al."Northern Sky Galactic Cosmic Ray Anisotropy between 10 and 1000 TeV with the Tibet Air Shower Array".The Astrophysical Journal 836.2(2017).
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