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Type: Journal article
Title: Features of the energy spectrum of cosmic Rays above 2.5 x 10¹⁸ eV using the Pierre Auger Observatory
Other Titles: Features of the energy spectrum of cosmic Rays above 2.5 x 10(18) eV using the Pierre Auger Observatory
Author: Aab, A.
Abreu, P.
Aglietta, M.
Albury, J.M.
Allekotte, I.
Almela, A.
Alvarez Castillo, J.
Alvarez-Muniz, J.
Batista, R.A.
Anastasi, G.A.
Anchordoqui, L.
Andrada, B.
Andringa, S.
Aramo, C.
Ferreira, P.R.A.
Asorey, H.
Assis, P.
Avila, G.
Badescu, A.M.
Bakalova, A.
et al.
Citation: Physical Review Letters, 2020; 125(12):121106-1-121106-10
Publisher: American Physical Society
Issue Date: 2020
ISSN: 0031-9007
Statement of
A. Aab, P. Abreu, M. Aglietta, J. M. Albury ... Roger Clay ... Bruce Dawson ... et al.
Abstract: We report a measurement of the energy spectrum of cosmic rays above 2.5×1018  eV based on 215 030 events. New results are presented: at about 1.3×1019  eV, the spectral index changes from 2.51±0.03(stat)±0.05(syst) to 3.05±0.05(stat)±0.10(syst), evolving to 5.1±0.3(stat)±0.1(syst) beyond 5×1019  eV, while no significant dependence of spectral features on the declination is seen in the accessible range. These features of the spectrum can be reproduced in models with energy-dependent mass composition. The energy density in cosmic rays above 5×1018  eV is [5.66±0.03(stat)±1.40(syst)]×1053  erg Mpc−3.
Keywords: Pierre Auger Collaboration
Rights: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
RMID: 1000026692
DOI: 10.1103/PhysRevLett.125.121106
Appears in Collections:Physics publications

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