Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.
M. Amenomori,1S. Ayabe,2X. J. Bi,3D. Chen,4S. W. Cui,5Danzengluobu,6L. K. Ding,3X. H. Ding,6C. F. Feng,7Zhaoyang Feng,3Z. Y. Feng,8X. Y. Gao,9Q. X. Geng,9H. W. Guo,6H. H. He,3M. He,7K. Hibino,10N. Hotta,11Haibing Hu,6H. B. Hu,3J. Huang,12Q. Huang,8H. Y. Jia,8F. Kajino,13K. Kasahara,14Y. Katayose,4C. Kato,15K. Kawata,12Labaciren,6G. M. Le,16A. F. Li,7J. Y. Li,7Y.-Q. Lou,17H. Lu,3S. L. Lu,3X. R. Meng,6K. Mizutani,2,18J. Mu,9K. Munakata,15A. Nagai,19H. Nanjo,1M. Nishizawa,20M. Ohnishi,12I. Ohta,21H. Onuma,2T. Ouchi,10S. Ozawa,12J. R. Ren,3T. Saito,22T. Y. Saito,12M. Sakata,13T. K. Sako,12T. Sasaki,10M. Shibata,4A. Shiomi,12T. Shirai,10H. Sugimoto,23M. Takita,12Y. H. Tan,3N. Tateyama,10S. Torii,18H. Tsuchiya,24S. Udo,12B. Wang,9H. Wang,3X. Wang,12Y. G. Wang,7H. R. Wu,3L. Xue,7Y. Yamamoto,13C. T. Yan,12X. C. Yang,9S. Yasue,25Z. H. Ye,16G. C. Yu,8A. F. Yuan,6T. Yuda,10H. M. Zhang,3J. L. Zhang,3N. J. Zhang,7X. Y. Zhang,7Y. Zhang,3Yi Zhang,3*Zhaxisangzhu,6X. X. Zhou8 (The Tibet AS Collaboration)
The intensity of Galactic cosmic rays is nearly isotropic becauseof the influence of magnetic fields in the Milky Way. Here,we present two-dimensional high-precision anisotropy measurementfor energies from a few to several hundred teraelectronvolts(TeV), using the large data sample of the Tibet Air Shower Arrays.Besides revealing finer details of the known anisotropies, anew component of Galactic cosmic ray anisotropy in siderealtime is uncovered around the Cygnus region direction. For cosmic-rayenergies up to a few hundred TeV, all components of anisotropiesfade away, showing a corotation of Galactic cosmic rays withthe local Galactic magnetic environment. These results havebroad implications for a comprehensive understanding of cosmicrays, supernovae, magnetic fields, and heliospheric and Galacticdynamic environments.
1 Department of Physics, Hirosaki University, Hirosaki 036-8561, Japan. 2 Department of Physics, Saitama University, Saitama 338-8570, Japan. 3 Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China. 4 Faculty of Engineering, Yokohama National University, Yokohama 240-8501, Japan. 5 Department of Physics, Hebei Normal University, Shijiazhuang 050016, China. 6 Department of Mathematics and Physics, Tibet University, Lhasa 850000, China. 7 Department of Physics, Shandong University, Jinan 250100, China. 8 Institute of Modern Physics, SouthWest Jiaotong University, Chengdu 610031, China. 9 Department of Physics, Yunnan University, Kunming 650091, China. 10 Faculty of Engineering, Kanagawa University, Yokohama 221-8686, Japan. 11 Faculty of Education, Utsunomiya University, Utsunomiya 321-8505, Japan. 12 Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582, Japan. 13 Department of Physics, Konan University, Kobe 658-8501, Japan. 14 Faculty of Systems Engineering, Shibaura Institute of Technology, Saitama 337-8570, Japan. 15 Department of Physics, Shinshu University, Matsumoto 390-8621, Japan. 16 Center of Space Science and Application Research, Chinese Academy of Sciences, Beijing 100080, China. 17 Physics Department and Tsinghua Center for Astrophysics, Tsinghua University, Beijing 100084, China. 18 Advanced Research Institute for Science and Engineering, Waseda University, Tokyo 169-8555, Japan. 19 Advanced Media Network Center, Utsunomiya University, Utsunomiya 321-8585, Japan. 20 National Institute of Informatics, Tokyo 101-8430, Japan. 21 Tochigi Study Center, University of the Air, Utsunomiya 321-0943, Japan. 22 Tokyo Metropolitan College of Industrial Technology, Tokyo 116-8523, Japan. 23 Shonan Institute of Technology, Fujisawa 251-8511, Japan. 24 RIKEN, Wako 351-0198, Japan. 25 School of General Education, Shinshu University, Matsumoto 390-8621, Japan.
* To whom correspondence should be addressed. E-mail: zhangyi{at}mail.ihep.ac.cn
Collaboration)
