Features of the energy spectrum of cosmic rays above 2.5 × 10.sup.18./sup. eV using the Pierre Auger Observatory

0535287 - FZÚ 2021 RIV US eng J - Článek v odborném periodiku
Aab, A. - Abreu, P. - Aglietta, M. - Bakalová, Alena - Blažek, Jiří - Boháčová, Martina - Chudoba, Jiří - Ebr, Jan - Juryšek, Jakub - Mandát, Dušan - Palatka, Miroslav - Pech, Miroslav - Prouza, Michael - Řídký, Jan - dos Santos, Eva M. Martins - Schovánek, Petr - Tobiška, Petr - Trávníček, Petr - Vícha, Jakub - Yushkov, Alexey … celkem 382 autorů
Features of the energy spectrum of cosmic rays above 2.5 × 10¹⁸ eV using the Pierre Auger Observatory.
Physical Review Letters. Roč. 125, č. 12 (2020), s. 1-10, č. článku 121106. ISSN 0031-9007. E-ISSN 1079-7114
Grant CEP: GA MŠMT LTT18004; GA MŠMT LM2015038; GA MŠMT(CZ) EF18_046/0016010; GA MŠMT EF16_013/0001402; GA MŠMT(CZ) LM2018102
Grant ostatní: OP VVV - AUGERII.CZ(XE) CZ.02.1.01/0.0/0.0/18_046/0016010; OP VVV - AUGER-CZ(XE) CZ.02.1.01/0.0/0.0/16_013/0001402
Institucionální podpora: RVO:68378271
Klíčová slova: cosmic rays * Pierre Auger Observatory * surface detector array
Obor OECD: Particles and field physics
Impakt faktor: 9.161, rok: 2020
Způsob publikování: Open access

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).

Trvalý link: http://hdl.handle.net/11104/0313356