Work

Measurements of cosmic-ray anisotropy using LHAASO-WCDA

Year: 2025

Type: conference-paper

Abstract: The cosmic-ray anisotropy is now used to help unveil nearby cosmic-ray accelerators and their local propagation environment. The LHAASO-WCDA experiment is composed of three water ponds. It covers a total detection area of 87000 ${\rm m}^2$, which makes it an ideal detector for measuring the cosmic-ray anisotropy from hundreds of GeV to $\sim$ PeV. In this talk, we present the measurements of the cosmic-ray anisotropies using two years of WCDA data. We extended our measurement to the lower energy, about 600 GeV. We find a significant energy dependence of the dipole component of the sidereal-time anisotropy below several TeV. Meanwhile, we also find the remarkable influence of solar activities on the solar-time anisotropy at sub-TeV.

Source: International Cosmic Ray Conference

DOI: 10.22323/1.501.0320

Authors: Wei Liu, Dan Li, Dong-xu Sun, Hong-bo Hu, Qiang Yuan, Yi-Qing Guo

Institutions: University of Chinese Academy of Sciences, Chinese Academy of Sciences, Institute of High Energy Physics, University of Science and Technology of China, Purple Mountain Observatory

Language: English

Topic: Astrophysics and Cosmic Phenomena

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

OpenAlex ID: W4414529264

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