Arrival Directions of Cosmic Rays above 32 EeV from Phase One of the Pierre Auger Observatory

A promising energy range to look for angular correlations between cosmic rays of extragalactic origin and their sources is at the highest energies, above a few tens of EeV (1 EeV ≡ 1018 eV). Despite the flux of these particles being extremely low, the area of ∼3000 km2 covered at the Pierre Auger Ob...

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Autores principales: Micheletti, M. I., Binet, V., The Pierre Auger collaboration
Formato: article artículo publishedVersion
Lenguaje:Inglés
Publicado: Institute of Physics 2023
Materias:
Ultra-high-energy cosmic radiation
Cosmic ray astronomy
Clustering
Active galaxies
Starburst galaxies
Acceso en línea:http://hdl.handle.net/2133/25269
http://hdl.handle.net/2133/25269
Aporte de:
Repositorio Hipermedial de la Universidad Nacional de Rosario (UNR) de Universidad Nacional de Rosario
id I15-R121-2133-25269
record_format dspace
institution Universidad Nacional de Rosario
institution_str I-15
repository_str R-121
collection Repositorio Hipermedial de la Universidad Nacional de Rosario (UNR)
language Inglés
topic Ultra-high-energy cosmic radiation
Cosmic ray astronomy
Clustering
Active galaxies
Starburst galaxies
spellingShingle Ultra-high-energy cosmic radiation
Cosmic ray astronomy
Clustering
Active galaxies
Starburst galaxies
Micheletti, M. I.
Binet, V.
The Pierre Auger collaboration
Arrival Directions of Cosmic Rays above 32 EeV from Phase One of the Pierre Auger Observatory
topic_facet Ultra-high-energy cosmic radiation
Cosmic ray astronomy
Clustering
Active galaxies
Starburst galaxies
description A promising energy range to look for angular correlations between cosmic rays of extragalactic origin and their sources is at the highest energies, above a few tens of EeV (1 EeV ≡ 1018 eV). Despite the flux of these particles being extremely low, the area of ∼3000 km2 covered at the Pierre Auger Observatory, and the 17 yr data-taking period of the Phase 1 of its operations, have enabled us to measure the arrival directions of more than 2600 ultrahigh-energy cosmic rays above 32 EeV. We publish this data set, the largest available at such energies from an integrated exposure of 122,000 km2 sr yr, and search it for anisotropies over the 3.4π steradians covered with the Observatory. Evidence for a deviation in excess of isotropy at intermediate angular scales, with ∼15° Gaussian spread or ∼25° top-hat radius, is obtained at the 4σ significance level for cosmic-ray energies above ∼40 EeV.
format article
artículo
publishedVersion
author Micheletti, M. I.
Binet, V.
The Pierre Auger collaboration
author_facet Micheletti, M. I.
Binet, V.
The Pierre Auger collaboration
author_sort Micheletti, M. I.
title Arrival Directions of Cosmic Rays above 32 EeV from Phase One of the Pierre Auger Observatory
title_short Arrival Directions of Cosmic Rays above 32 EeV from Phase One of the Pierre Auger Observatory
title_full Arrival Directions of Cosmic Rays above 32 EeV from Phase One of the Pierre Auger Observatory
title_fullStr Arrival Directions of Cosmic Rays above 32 EeV from Phase One of the Pierre Auger Observatory
title_full_unstemmed Arrival Directions of Cosmic Rays above 32 EeV from Phase One of the Pierre Auger Observatory
title_sort arrival directions of cosmic rays above 32 eev from phase one of the pierre auger observatory
publisher Institute of Physics
publishDate 2023
url http://hdl.handle.net/2133/25269
http://hdl.handle.net/2133/25269
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AT binetv arrivaldirectionsofcosmicraysabove32eevfromphaseoneofthepierreaugerobservatory
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