| Issue |
EPJ Web Conf.
Volume 319, 2025
RICAP-24, 9th Roma International Conference on Astroparticle Physics
|
|
|---|---|---|
| Article Number | 07001 | |
| Number of page(s) | 4 | |
| Section | Parallel Session: High Energy Cosmic Rays | |
| DOI | https://doi.org/10.1051/epjconf/202531907001 | |
| Published online | 06 March 2025 | |
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
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