INVESTIGADORES
MARIAZZI Analisa Gabriela
artículos
Título:
Features of the energy spectrum of cosmic rays above 2.5×1018 eV using the pierre auger observatory
Autor/es:
AAB, A.; ABREU, P.; AGLIETTA, M.; ALBURY, J.M.; ALLEKOTTE, I.; ALMELA, A.; ALVAREZ CASTILLO, J.; ALVAREZ-MUÑIZ, J.; ALVES BATISTA, R.; ANASTASI, G.A.; ANCHORDOQUI, L.; ANDRADA, B.; ANDRINGA, S.; ARAMO, C.; ARAÚJO FERREIRA, P.R.; ASOREY, H.; ASSIS, P.; AVILA, G.; BADESCU, A.M.; BAKALOVA, A.; BALACEANU, A.; BARBATO, F.; BARREIRA LUZ, R.J.; BECKER, K.H.; BELLIDO, J.A.; BERAT, C.; BERTAINA, M.E.; BERTOU, X.; BIERMANN, P.L.; BISTER, T.; BITEAU, J.; BLANCO, A.; BLAZEK, J.; BLEVE, C.; BOHÁ?OVÁ, M.; BONCIOLI, D.; BONIFAZI, C.; BONNEAU ARBELETCHE, L.; BORODAI, N.; BOTTI, A.M.; BRACK, J.; BRETZ, T.; BRIECHLE, F.L.; BUCHHOLZ, P.; BUENO, A.; BUITINK, S.; BUSCEMI, M.; CABALLERO-MORA, K.S.; CACCIANIGA, L.; CALCAGNI, L.; CANCIO, A.; CANFORA, F.; CARACAS, I.; CARCELLER, J.M.; CARUSO, R.; CASTELLINA, A.; CATALANI, F.; CATALDI, G.; CAZON, L.; CERDA, M.; CHINELLATO, J.A.; CHOI, K.; CHUDOBA, J.; CHYTKA, L.; CLAY, R.W.; COBOS CERUTTI, A.C.; COLALILLO, R.; COLEMAN, A.; COLUCCIA, M.R.; CONCEIÇÃO, R.; CONDORELLI, A.; CONSOLATI, G.;
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: Maryland; Año: 2020 vol. 125
ISSN:
0031-9007
Resumen:
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.