Observation of the suppression of the flux of cosmic rays above 4×1019eV

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The energy spectrum of cosmic rays above 2.5×1018eV, derived from 20000 events recorded at the Pierre Auger Observatory, is described. The spectral index γ of the particle flux, JE-γ, at energies between 4×1018eV and 4×1019eV is 2.69±0.02(stat)±0.06(syst), steepening to 4.2±0.4(stat)±0.06(syst) at h...

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Autor principal: Multitudinario:458
Formato: JOUR
Materias:
Cosmology
Energy spectra
Particle fluxes
Pierre Auger observatory
Power-law
Spectral indices
Standard deviation
Cosmic rays
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00319007_v101_n6_p_Multitudinario
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00319007_v101_n6_p_Multitudinario2023-10-03T14:42:02Z Observation of the suppression of the flux of cosmic rays above 4×1019eV Multitudinario:458 Cosmology Energy spectra Particle fluxes Pierre Auger observatory Power-law Spectral indices Standard deviation Cosmic rays The energy spectrum of cosmic rays above 2.5×1018eV, derived from 20000 events recorded at the Pierre Auger Observatory, is described. The spectral index γ of the particle flux, JE-γ, at energies between 4×1018eV and 4×1019eV is 2.69±0.02(stat)±0.06(syst), steepening to 4.2±0.4(stat)±0.06(syst) at higher energies. The hypothesis of a single power law is rejected with a significance greater than 6 standard deviations. The data are consistent with the prediction by Greisen and by Zatsepin and Kuz'min. © 2008 The American Physical Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00319007_v101_n6_p_Multitudinario
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cosmology
Energy spectra
Particle fluxes
Pierre Auger observatory
Power-law
Spectral indices
Standard deviation
Cosmic rays
spellingShingle Cosmology
Energy spectra
Particle fluxes
Pierre Auger observatory
Power-law
Spectral indices
Standard deviation
Cosmic rays
Multitudinario:458
Observation of the suppression of the flux of cosmic rays above 4×1019eV
topic_facet Cosmology
Energy spectra
Particle fluxes
Pierre Auger observatory
Power-law
Spectral indices
Standard deviation
Cosmic rays
description The energy spectrum of cosmic rays above 2.5×1018eV, derived from 20000 events recorded at the Pierre Auger Observatory, is described. The spectral index γ of the particle flux, JE-γ, at energies between 4×1018eV and 4×1019eV is 2.69±0.02(stat)±0.06(syst), steepening to 4.2±0.4(stat)±0.06(syst) at higher energies. The hypothesis of a single power law is rejected with a significance greater than 6 standard deviations. The data are consistent with the prediction by Greisen and by Zatsepin and Kuz'min. © 2008 The American Physical Society.
format JOUR
author Multitudinario:458
author_facet Multitudinario:458
author_sort Multitudinario:458
title Observation of the suppression of the flux of cosmic rays above 4×1019eV
title_short Observation of the suppression of the flux of cosmic rays above 4×1019eV
title_full Observation of the suppression of the flux of cosmic rays above 4×1019eV
title_fullStr Observation of the suppression of the flux of cosmic rays above 4×1019eV
title_full_unstemmed Observation of the suppression of the flux of cosmic rays above 4×1019eV
title_sort observation of the suppression of the flux of cosmic rays above 4×1019ev
url http://hdl.handle.net/20.500.12110/paper_00319007_v101_n6_p_Multitudinario
work_keys_str_mv AT multitudinario458 observationofthesuppressionofthefluxofcosmicraysabove41019ev
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