EPJ Web of Conferences (Jan 2023)

Search for the large-scale cosmic-ray anisotropies using the TA and TALE surface detector arrays

  • Kimura Yusuke,
  • Fujii Toshihiro,
  • Ogio Shoichi,
  • Tsunesada Yoshiki

DOI
https://doi.org/10.1051/epjconf/202328303007
Journal volume & issue
Vol. 283
p. 03007

Abstract

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Origins of ultra-high-energy cosmic rays (UHECRs) are still largely unknown. In particular, the “2nd knee” around 1017 eV could be related to a transition of origins from the galactic to extra-galactic sources. In this scenario, one would expect the large-scale anisotropies of UHECRs to change over the 2nd knee region. We search for large-scale anisotropies using data taken from surface detector (SD) arrays of the Telescope Array experiment (TA), the largest cosmic-ray detector in the northern hemisphere, and from its low energy extension, the Telescope Array Low-energy Extension (TALE). In this contribution, we report on preliminary results in the search for the large-scale cosmic-ray anisotropies with 11-years TA SD and two-years TALE SD data.