https://doi.org/10.1051/epjconf/202531907001
Large-scale anisotropies of ultra-high-energy cosmic rays measured at the Pierre Auger Observatory
1 Università degli studi di Torino & INFN, Sezione di Torino, Via Giuria 1, Torino, Italy
2 Observatorio Pierre Auger, Av. San Martín Norte 304, 5613 Malargüe, Argentina
* e-mail: spokespersons@auger.org
Published online: 6 March 2025
Measurements of anisotropies in the arrival directions of ultra-high-energy cosmic rays are crucial to pinpoint their sources, which are yet to be discovered. A dipolar anisotropy in right ascension above 8 EeV has been detected by the Pierre Auger Observatory with a significance of 6.8σ. The direction of the dipole suggests an extragalactic origin of ultra-high-energy cosmic rays above those energies. In this contribution, we provide an overview of the studies on large-scale anisotropies in the arrival directions of ultra-high-energy cosmic rays measured at the Pierre Auger Observatory with energy thresholds from ∼ 0.03 EeV up to 32 EeV and we present and discuss the recent results achieved with the latest available dataset, which includes 19 years of operations – resulting in a total exposure of 123,000 km2 sr yr and nearly 50,000 events above 8 EeV.
© The Authors, published by EDP Sciences, 2025
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
