Large-scale anisotropies of ultra-high-energy cosmic rays measured at the Pierre Auger Observatory
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 direct...
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EDP Sciences
2025-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2025/04/epjconf_ricap2024_07001.pdf |
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| author | Bianciotto Marta |
| author_facet | Bianciotto Marta |
| author_sort | Bianciotto Marta |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-da1ec6a8d4e949d3be8dbb09512637a2 |
| institution | OA Journals |
| issn | 2100-014X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj-art-da1ec6a8d4e949d3be8dbb09512637a22025-08-20T01:51:57ZengEDP SciencesEPJ Web of Conferences2100-014X2025-01-013190700110.1051/epjconf/202531907001epjconf_ricap2024_07001Large-scale anisotropies of ultra-high-energy cosmic rays measured at the Pierre Auger ObservatoryBianciotto Marta0Università degli studi di Torino & INFN, Sezione di TorinoMeasurements 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.https://www.epj-conferences.org/articles/epjconf/pdf/2025/04/epjconf_ricap2024_07001.pdf |
| spellingShingle | Bianciotto Marta Large-scale anisotropies of ultra-high-energy cosmic rays measured at the Pierre Auger Observatory EPJ Web of Conferences |
| title | Large-scale anisotropies of ultra-high-energy cosmic rays measured at the Pierre Auger Observatory |
| title_full | Large-scale anisotropies of ultra-high-energy cosmic rays measured at the Pierre Auger Observatory |
| title_fullStr | Large-scale anisotropies of ultra-high-energy cosmic rays measured at the Pierre Auger Observatory |
| title_full_unstemmed | Large-scale anisotropies of ultra-high-energy cosmic rays measured at the Pierre Auger Observatory |
| title_short | Large-scale anisotropies of ultra-high-energy cosmic rays measured at the Pierre Auger Observatory |
| title_sort | large scale anisotropies of ultra high energy cosmic rays measured at the pierre auger observatory |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2025/04/epjconf_ricap2024_07001.pdf |
| work_keys_str_mv | AT bianciottomarta largescaleanisotropiesofultrahighenergycosmicraysmeasuredatthepierreaugerobservatory |