Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory
A. AabInstitute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud Universiteit, Nijmegen, NetherlandsP. AbreuLaboratório de Instrumentação e Física Experimental de Partículas—LIP and Instituto Superior Técnico—IST, Universidade de Lisboa—UL, PortugalM. AgliettaINFN, Sezione di Torino, ItalyI. Al SamaraiLaboratoire de Physique Nucléaire et de Hautes ÉnergiesI. F. M. AlbuquerqueUniversidade de São Paulo, Inst. de Física, São Paulo, BrazilI. AllekotteCentro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), ArgentinaA. AlmelaInstituto de Tecnologías en Detección y AstropartículasJ. Alvarez CastilloUniversidad Nacional Autónoma de México, MéxicoJaime Álvarez-MuñizUniversidad de Santiago de Compostela, SpainGioacchino Alex AnastasiGran Sasso Science Institute (INFN), L'Aquila, ItalyLuis A. AnchordoquiDepartment of Physics and Astronomy, Lehman College, City University of New York, U.S.ABelén AndradaComisión Nacional de Energía AtómicaS. AndringaLIP - Laboratory of Instrumentation and Experimental Particle PhysicsC. AramoINFN, Sezione di Napoli, ItalyF. ArquerosUniversidad Complutense de Madrid, SpainN. ArseneUniversity of Bucharest, Physics Department, RomaniaH. AsoreyUniversidad Industrial de Santander, ColombiaP. AssisLaboratório de Instrumentação e Física Experimental de Partículas—LIP and Instituto Superior Técnico—IST, Universidade de Lisboa—UL, PortugalJ. AublinUniversité Paris CitéG. ÁvilaObservatorio Pierre Auger, ArgentinaAlina Mihaela BadescuUniversity Politehnica of Bucharest, RomaniaA. Balaceanu``Horia Hulubei'' National Institute for Physics and Nuclear Engineering, RomaniaRicardo Jorge Barreira LuzLaboratório de Instrumentação e Física Experimental de Partículas—LIP and Instituto Superior Técnico—IST, Universidade de Lisboa—UL, PortugalJ. J. BeattyOhio State University, U.S.AK. H. BeckerBergische Universität Wuppertal, Department of Physics, GermanyJose A. BellidoUniversity of Adelaide, AustraliaC. BeratLaboratoire de Physique Subatomique et de CosmologieM. E. BertainaINFN, Sezione di Torino, ItalyX. BertouBalseiro InstitutePeter L. BiermannMax-Planck-Institut für Radioastronomie, Bonn, GermanyP. BilloirInstitut National de Physique Nucléaire et de Physique des ParticulesJonathan BiteauCentre National de la Recherche ScientifiqueS. G. BlaessUniversity of Adelaide, AustraliaA. BlancoLIP - Laboratory of Instrumentation and Experimental Particle PhysicsJiří BlažekInstitute of Physics (FZU) of the Academy of Sciences of the Czech Republic, Czech RepublicC. BleveINFN, Sezione di Lecce, ItalyM. BoháčováInstitute of Physics (FZU) of the Academy of Sciences of the Czech Republic, Czech RepublicDenise Bonciolinow at Deutsches Elektronen-Synchrotron (DESY), Zeuthen, GermanyC. BonifaziUniversidade Federal do Rio de Janeiro (UFRJ), Instituto de Física, BrazilNataliia BorodaiAna Martina BottiInstituto de Tecnologías en Detección y AstropartículasJ. BrackColorado State University, U.S.AI. Brancus``Horia Hulubei'' National Institute for Physics and Nuclear Engineering, RomaniaT. BretzRWTH Aachen University, III. Physikalisches Institut A, GermanyA. BridgemanKarlsruhe Institute of Technology, Institut für Kernphysik (IKP), GermanyF. L. BriechleRWTH Aachen University, III. Physikalisches Institut A, GermanyP. BuchholzFolkwang University of the ArtsA. BuenoUniversidad de Granada and C.A.F.P.E., SpainS. BuitinkInstitute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud Universiteit, Nijmegen, NetherlandsMario BuscemiUniversità di Catania, Dipartimento di Fisica e Astronomia, ItalyK. S. Caballero‐MoraUniversidad Autónoma de Chiapas, MéxicoLorenzo CaccianigaUniversità di Milano, Dipartimento di Fisica, ItalyA. CancioInstituto de Tecnologías en Detección y AstropartículasF. CanforaInstitute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud Universiteit, Nijmegen, NetherlandsL. CarameteInstitute of Space Science, RomaniaR. CarusoUniversità di Catania, Dipartimento di Fisica e Astronomia, ItalyA. CastellinaINFN, Sezione di Torino, ItalyG. CataldiINFN, Sezione di Lecce, ItalyLorenzo CazonLIP - Laboratory of Instrumentation and Experimental Particle PhysicsA.G. ChavezUniversidad Michoacana de San Nicolás de Hidalgo, MéxicoC. DobrigkeitUniversidade Estadual de Campinas (UNICAMP), BrazilJ. ChudobaInstitute of Physics (FZU) of the Academy of Sciences of the Czech Republic, Czech RepublicR. W. ClayUniversity of Adelaide, AustraliaRoberta ColalilloINFN, Sezione di Napoli, ItalyAlan ColemanPennsylvania State University, U.S.AL. CollicaINFN, Sezione di Torino, ItalyM. R. ColucciaINFN, Sezione di Lecce, ItalyR. ConceiçãoLaboratório de Instrumentação e Física Experimental de Partículas—LIP and Instituto Superior Técnico—IST, Universidade de Lisboa—UL, PortugalF. ContrerasObservatorio Pierre Auger, ArgentinaM. J. CooperUniversity of Adelaide, AustraliaS. CoutuPennsylvania State University, U.S.AC. E. CovaultCase Western Reserve University, U.S.AJ. CroninUniversity of Chicago, U.S.AS. D’AmicoINFN, Sezione di Lecce, ItalyB. DanielUniversidade Estadual de Campinas (UNICAMP), BrazilS. DassoInstituto de Astronomía y Física del Espacio (IAFE, CONICET-UBA), ArgentinaK. DaumillerKarlsruhe Institute of Technology, Institut für Kernphysik (IKP), GermanyB. R. DawsonUniversity of Adelaide, AustraliaR. M. de AlmeidaUniversidade Federal Fluminense, BrazilS. J. de JongInstitute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud Universiteit, Nijmegen, NetherlandsG. De MauroInstitute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud Universiteit, Nijmegen, NetherlandsJ.R.T. de Mello NetoUniversidade Federal do Rio de Janeiro (UFRJ), Instituto de Física, BrazilI. De MitriUniversità del Salento, Dipartimento di Matematica e Fisica “E. De Giorgi”, ItalyJ. de OliveiraUniversidade Federal Fluminense, BrazilV. de SouzaUniversidade de São PauloJ. DebatinKarlsruhe Institute of Technology, Institut für Kernphysik (IKP), GermanyO. DelignyInstitut National de Physique Nucléaire et de Physique des ParticulesC. Di GiulioUniversità di Roma “Tor Vergata”, Dipartimento di Fisica, ItalyA. di MatteoINFN, Gruppo Collegato dell'Aquila, ItalyM. L. Díaz CastroUniversidade Estadual de Campinas (UNICAMP), BrazilF. DiogoLIP - Laboratory of Instrumentation and Experimental Particle PhysicsC. DobrigkeitUniversidade Estadual de Campinas (UNICAMP), BrazilJuan Carlos D’OlivoUniversidad Nacional Autónoma de México, MéxicoQ. DorostiUniversität Siegen, Fachbereich 7 Physik—Experimentelle Teilchenphysik, GermanyR. C. dos AnjosUniversidade Federal do Paraná, Setor Palotina, BrazilM. T. DovaUniversidad Nacional de La PlataA. DundovicUniversität Hamburg, II. Institut für Theoretische Physik, GermanyJan EbrInstitute of Physics (FZU) of the Academy of Sciences of the Czech Republic, Czech RepublicR. EngelKarlsruhe Institute of Technology, Institut für Kernphysik (IKP), GermanyM. ErdmannRWTH Aachen University, III. Physikalisches Institut A, Germany
2017en
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Annotatsiya
We present a combined fit of a simple astrophysical model of UHECR sources to both the energy spectrum and mass composition data measured by the Pierre Auger Observatory. The fit has been performed for energies above 5 10 18 eV, i.e. the region of the all-particle spectrum above the so-called "ankle" feature. The astrophysical model we adopted consists of identical sources uniformly distributed in a comoving volume, where nuclei are accelerated through a rigidity-dependent mechanism. The fit results suggest sources characterized by relatively low maximum injection energies, hard spectra and heavy chemical composition. We also show that uncertainties about physical quantities relevant to UHECR propagation and shower development have a non-negligible impact on the fit results.
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