Impact of the magnetic horizon on the interpretation of the Pierre Auger Observatory spectrum and composition data

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dc.citation.titleJournal of Cosmology and Astroparticle Physics
dc.citation.volume2024
dc.creatorBinet, V.
dc.creatorMicheletti, M. I.
dc.creatorThe Pierre Auger collaboration
dc.date.accessioned2025-03-11T18:15:00Z
dc.date.available2025-03-11T18:15:00Z
dc.date.issued2024-07-30
dc.description.abstractThe flux of ultra-high energy cosmic rays reaching Earth above the ankle energy (5 EeV) can be described as a mixture of nuclei injected by extragalactic sources with very hard spectra and a low rigidity cutoff. Extragalactic magnetic fields existing between the Earth and the closest sources can affect the observed CR spectrum by reducing the flux of low-rigidity particles reaching Earth. We perform a combined fit of the spectrum and distributions of depth of shower maximum measured with the Pierre Auger Observatory including the effect of this magnetic horizon in the propagation of UHECRs in the intergalactic space. We find that, within a specific range of the various experimental and phenomenological systematics, the magnetic horizon effect can be relevant for turbulent magnetic field strengths in the local neighbourhood in which the closest sources lie of order Brms ā‰ƒ (50ā€“100) nG (20 Mpc/ds)(100 kpc/Lcoh) 1/2, with ds the typical intersource separation and Lcoh the magnetic field coherence length. When this is the case, the inferred slope of the source spectrum becomes softer and can be closer to the expectations of diffusive shock acceleration, i.e., āˆ Eāˆ’2. An additional cosmic-ray population with higher source density and softer spectra, presumably also extragalactic and dominating the cosmic-ray flux at EeV energies, is also required to reproduce the overall spectrum and composition results for all energies down to 0.6 EeV.
dc.description.filFil: Binet, V. Universidad Nacional de Rosario. Facultad de Ciencias Bioquƭmicas y FarmacƩuticas. Instituto de Fƭsica de Rosario (IFIR-CONICET); Argentina.
dc.description.filFil: Micheletti, M. I. Universidad Nacional de Rosario. Facultad de Ciencias Bioquƭmicas y FarmacƩuticas. Instituto de Fƭsica de Rosario (IFIR-CONICET); Argentina.
dc.description.sponsorshipComisiĆ³n Nacional de EnergĆ­a AtĆ³mica
dc.description.sponsorshipAgencia Nacional de PromociĆ³n CientĆ­fica y TecnolĆ³gica (ANPCyT)
dc.description.sponsorshipConsejo Nacional de Investigaciones CientĆ­ficas y TĆ©cnicas (CONICET)
dc.description.sponsorshipGobierno de la Provincia de Mendoza
dc.description.sponsorshipMunicipalidad de MalargĆ¼e
dc.description.sponsorshipNDM Holdings and Valle Las LeƱas
dc.description.sponsorshipFonds de la Recherche Scientifique (FNRS)
dc.description.sponsorshipthe Australian Research Council
dc.description.sponsorshipResearch Foundation Flanders (FWO)
dc.description.sponsorshipMarie Curie Action of the European Union: 101107047
dc.description.sponsorshipConselho Nacional de Desenvolvimento CientĆ­fico e TecnolĆ³gico (CNPq)
dc.description.sponsorshipFinanciadora de Estudos e Projetos (FINEP)
dc.description.sponsorshipFundaĆ§Ć£o de Amparo Ć  Pesquisa do Estado de Rio de Janeiro (FAPERJ)
dc.description.sponsorshipSĆ£o Paulo Research Foundation (FAPESP): 2019/10151-2, 2010/07359-6, 1999/05404-3
dc.description.sponsorshipMinistĆ©rio da CiĆŖncia, Tecnologia, InovaƧƵes e ComunicaƧƵes (MCTIC)
dc.description.sponsorshipConseil RĆ©gional Ile-de-France
dc.description.sponsorshipDƩpartement Physique NuclƩaire et Corpusculaire: PNCIN2P3/CNRS
dc.description.sponsorshipDĆ©partement Sciences de lā€™Univers: SDU-INSU/CNRS
dc.description.sponsorshipInstitut Lagrange de Paris (ILP): LABEX ANR-10-LABX-63
dc.description.sponsorshipBundesministerium fĆ¼r Bildung und Forschung (BMBF)
dc.description.sponsorshipDeutsche Forschungsgemeinschaft (DFG)
dc.description.sponsorshipFinanzministerium BadenWĆ¼rttemberg
dc.description.sponsorshipHelmholtz Alliance for Astroparticle Physics (HAP)
dc.description.sponsorshipHelmholtz-Gemeinschaft
dc.description.sponsorshipDeutscher Forschungszentren (HGF)
dc.description.sponsorshipMinisterium fĆ¼r Kultur und Wissenschaft des Landes Nordrhein-Westfalen
dc.description.sponsorshipMinisterium fĆ¼r Wissenschaft, Forschung und Kunst des Landes BadenWĆ¼rttemberg
dc.description.sponsorshipIstituto Nazionale di Fisica Nucleare (INFN)
dc.description.sponsorshipIstituto Nazionale di Astrofisica (INAF)
dc.description.sponsorshipMinistero dellā€™UniversitĆ  e della Ricerca (MUR)
dc.description.sponsorshipMinistero degli Affari Esteri (MAE),
dc.description.sponsorshipCentro Nazionale di Ricerca in High Performance Computing, Big Data and Quantum Computing
dc.description.sponsorshipConsejo Nacional de Ciencia y TecnologĆ­a (CONACYT): 167733
dc.description.sponsorshipUniversidad Nacional AutĆ³noma de MĆ©xico: (UNAM)
dc.description.sponsorshipMinistry of Education, Culture and Science
dc.description.sponsorshipNetherlands Organisation for Scientific Research (NWO)
dc.description.sponsorshipMinistry of Education and Science: DIR/WK/2018/11 and 2022/WK/12
dc.description.sponsorshipNational Science Centre: 2016/22/M/ST9/00198, 2016/23/B/ST9/01635, 2020/39/B/ST9/01398, 2022/45/B/ST9/02163
dc.description.sponsorshipPrograma Operacional Factores de Competitividade through FundaĆ§Ć£o para a CiĆŖncia e a Tecnologia (COMPETE)
dc.description.sponsorshipMinistry of Research, Innovation and Digitization: 30N/2023
dc.description.sponsorshipRomanian National Core: PN 23 21 01 02, PN-III-P1-1.1-TE-2021-0924/TE57/2022
dc.description.sponsorshipSlovenian Research Agency: P1-0031, P1-0385, I0-0033, N1-0111
dc.description.sponsorshipMinisterio de Ciencia e InnovaciĆ³n/Agencia Estatal de InvestigaciĆ³n: PID2019-105544GB-I00, PID2022-140510NB-I00, RYC2019-027017-I
dc.description.sponsorshipNational Science Foundation: 0450696
dc.description.sponsorshipThe Grainger Foundation
dc.description.sponsorshipEuropean Particle Physics Latin American Network
dc.description.sponsorshipUnited Nations Educational, Scientific and Cultural organization (UNESCO)
dc.format.extent1-32
dc.identifier.citationAbdul Halim A., Abreu P., Aglietta M., Allekotte I., Cheminant K.A., Almela A., ... Zavrtanik M. (2023). Impact of the magnetic horizon on the interpretation of the Pierre Auger Observatory spectrum and composition data. Recuperado de: http://hdl.handle.net/11407/8746.
dc.identifier.issn1475-7516
dc.identifier.urihttps://hdl.handle.net/2133/29042
dc.language.isoen
dc.publisherIOP Publishing
dc.relation.publisherversionhttps://iopscience.iop.org/article/10.1088/1475-7516/2024/07/094
dc.relation.publisherversionhttps://doi.org/10.1088/1475-7516/2024/07/094
dc.rightsopenAccess
dc.rights.holderBinet, V.
dc.rights.holderMicheletti, M. I.
dc.rights.holderThe Pierre Auger collaboration
dc.rights.textAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectUltra high energy cosmic rays
dc.subjectCosmic ray experiments
dc.subjectCosmic ray theory
dc.titleImpact of the magnetic horizon on the interpretation of the Pierre Auger Observatory spectrum and composition data
dc.typearticulo
dc.type.collectionarticulo
dc.type.versionpublishedVersion

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