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Features of the energy spectrum of cosmic rays above 2.5 × 10.sup.18./sup. eV using the Pierre Auger Observatory
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SYSNO ASEP 0535287 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Features of the energy spectrum of cosmic rays above 2.5 × 1018 eV using the Pierre Auger Observatory Author(s) Aab, A. (NL)
Abreu, P. (PT)
Aglietta, M. (IT)
Bakalová, Alena (FZU-D) ORCID
Blažek, Jiří (FZU-D) ORCID, RID
Boháčová, Martina (FZU-D) RID, ORCID
Chudoba, Jiří (FZU-D) RID, ORCID
Ebr, Jan (FZU-D) RID, ORCID
Juryšek, Jakub (FZU-D) ORCID
Mandát, Dušan (FZU-D) RID, ORCID
Palatka, Miroslav (FZU-D) RID, ORCID, SAI
Pech, Miroslav (FZU-D) RID, ORCID
Prouza, Michael (FZU-D) RID, ORCID
Řídký, Jan (FZU-D) RID, ORCID
dos Santos, Eva M. Martins (FZU-D) ORCID
Schovánek, Petr (FZU-D) RID, ORCID
Tobiška, Petr (FZU-D) ORCID
Trávníček, Petr (FZU-D) RID, ORCID
Vícha, Jakub (FZU-D) RID, ORCID
Yushkov, Alexey (FZU-D) ORCIDNumber of authors 382 Article number 121106 Source Title Physical Review Letters. - : American Physical Society - ISSN 0031-9007
Roč. 125, č. 12 (2020), s. 1-10Number of pages 10 s. Language eng - English Country US - United States Keywords cosmic rays ; Pierre Auger Observatory ; surface detector array Subject RIV BF - Elementary Particles and High Energy Physics OECD category Particles and field physics R&D Projects LTT18004 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2015038 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF18_046/0016010 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF16_013/0001402 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2018102 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 000569641300005 EID SCOPUS 85092348814 DOI 10.1103/PhysRevLett.125.121106 Annotation We report a measurement of the energy spectrum of cosmic rays above 2.5 x 10(18) eV based on 215 030 events. New results are presented: at about 1.3 x 10(19) 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 x 10(19) 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 x 10(18) eV is [5.66 +/- 0.03(stat) +/- 1.40(syst)] x 10(53) erg Mpc(-3).
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2021 Electronic address http://hdl.handle.net/11104/0313356
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