Anisotropy and Corotation of Galactic Cosmic Rays
Author:
Amenomori M.12345, Ayabe S.12345, Bi X. J.12345, Chen D.12345, Cui S. W.12345, Danzengluobu 12345, Ding L. K.12345, Ding X. H.12345, Feng C. F.12345, Feng Zhaoyang12345, Feng Z. Y.12345, Gao X. Y.12345, Geng Q. X.12345, Guo H. W.12345, He H. H.12345, He M.12345, Hibino K.12345, Hotta N.12345, Hu Haibing12345, Hu H. B.12345, Huang J.12345, Huang Q.12345, Jia H. Y.12345, Kajino F.12345, Kasahara K.12345, Katayose Y.12345, Kato C.12345, Kawata K.12345, Labaciren 12345, Le G. M.12345, Li A. F.12345, Li J. Y.12345, Lou Y.-Q.12345, Lu H.12345, Lu S. L.12345, Meng X. R.12345, Mizutani K.12345, Mu J.12345, Munakata K.12345, Nagai A.12345, Nanjo H.12345, Nishizawa M.12345, Ohnishi M.12345, Ohta I.12345, Onuma H.12345, Ouchi T.12345, Ozawa S.12345, Ren J. R.12345, Saito T.12345, Saito T. Y.12345, Sakata M.12345, Sako T. K.12345, Sasaki T.12345, Shibata M.12345, Shiomi A.12345, Shirai T.12345, Sugimoto H.12345, Takita M.12345, Tan Y. H.12345, Tateyama N.12345, Torii S.12345, Tsuchiya H.12345, Udo S.12345, Wang B.12345, Wang H.12345, Wang X.12345, Wang Y. G.12345, Wu H. R.12345, Xue L.12345, Yamamoto Y.12345, Yan C. T.12345, Yang X. C.12345, Yasue S.12345, Ye Z. H.12345, Yu G. C.12345, Yuan A. F.12345, Yuda T.12345, Zhang H. M.12345, Zhang J. L.12345, Zhang N. J.12345, Zhang X. Y.12345, Zhang Y.12345, Zhang Yi12345, Zhaxisangzhu 12345, Zhou X. X.12345
Affiliation:
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.
Abstract
The intensity of Galactic cosmic rays is nearly isotropic because of the influence of magnetic fields in the Milky Way. Here, we present two-dimensional high-precision anisotropy measurement for 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, a new component of Galactic cosmic ray anisotropy in sidereal time is uncovered around the Cygnus region direction. For cosmic-ray energies up to a few hundred TeV, all components of anisotropies fade away, showing a corotation of Galactic cosmic rays with the local Galactic magnetic environment. These results have broad implications for a comprehensive understanding of cosmic rays, supernovae, magnetic fields, and heliospheric and Galactic dynamic environments.
Publisher
American Association for the Advancement of Science (AAAS)
Subject
Multidisciplinary
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