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https://hdl.handle.net/2440/128527
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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 1079-7114 |
Statement of Responsibility: | 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. |
DOI: | 10.1103/PhysRevLett.125.121106 |
Published version: | http://dx.doi.org/10.1103/physrevlett.125.121106 |
Appears in Collections: | Aurora harvest 8 Physics publications |
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