2019/01/01 by Xiaobo Qu, Qu, Xiaobo
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #Neutrino Physics Research
paper · pdf · doi:10.48550/arxiv.1901.00249
openalex publication_date 2019/01/01 · openalex created_date 2022/07/31 · openalex updated_date 2026/07/28
Recently studies of the dipole anisotropy in the arrival directions of\nGalactic cosmic rays indicate that the TeV-PeV dipole anisotropy amplitude is\nnot described by a simple power law, moreover a rapid phase change exists at an\nenergy of 0.1\∼0.3 PeV. In this work we argue that the dipole anisotropy\namplitude and phase evolution with energies can be reproduced under the\nspatially-dependent propagation scenario with a nearby single source added. Our\nresults indicate a nearby single source have significant influence to the\ncosmic ray gradient below 0.1\∼0.3 PeV under the spatially-dependent\npropagation scenario, which leads the dipole anisotropy phase change at this\nenergy region. The dipole anisotropy amplitude of the galactic cosmic rays can\nalso be maintained at a lower level, which are consistent with observations by\nunderground muons and air shower experiments.\n