Astrophysical interpretation of Pierre Auger Observatory measurements of the UHECR energy spectrum and mass composition

Pierre Auger Collaboration

doi:10.1051/epjconf/201713602002

Astrophysical interpretation of Pierre Auger Observatory measurements of the UHECR energy spectrum and mass composition

Pierre Auger Collaboration

Research output: Contribution to journal › Conference article › peer-review

Abstract

We present a combined fit of a simple astrophysical model of UHECR sources to both the energy spectrum and mass composition data measured by the Pierre Auger Observatory. The fit has been performed for energies above 5 EeV, i.e. the region of the all-particle spectrum above the so-called "ankle"' feature. The astrophysical model we adopted consists of identical sources uniformly distributed in a comoving volume, where nuclei are accelerated with a rigidity-dependent mechanism. The fit results suggest sources characterized by relatively low maximum injection energies and hard spectral indices. The impact of various systematic uncertainties on the above result is discussed.

Original language	English (US)
Article number	02002
Journal	EPJ Web of Conferences
Volume	136
DOIs	https://doi.org/10.1051/epjconf/201713602002
State	Published - Mar 23 2017
Event	6th Roma International Conference on Astroparticle Physics, RICAP 2016 - Frascati, Roma, Italy Duration: Jun 21 2016 → Jun 24 2016

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1051/epjconf/201713602002

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@article{88f9945f7dc44a89bc4f340979e4c074,

title = "Astrophysical interpretation of Pierre Auger Observatory measurements of the UHECR energy spectrum and mass composition",

abstract = "We present a combined fit of a simple astrophysical model of UHECR sources to both the energy spectrum and mass composition data measured by the Pierre Auger Observatory. The fit has been performed for energies above 5 EeV, i.e. the region of the all-particle spectrum above the so-called {"}ankle{"}' feature. The astrophysical model we adopted consists of identical sources uniformly distributed in a comoving volume, where nuclei are accelerated with a rigidity-dependent mechanism. The fit results suggest sources characterized by relatively low maximum injection energies and hard spectral indices. The impact of various systematic uncertainties on the above result is discussed.",

author = "\{Pierre Auger Collaboration\} and \{Di Matteo\}, Armando and A. Aab and P. Abreu and M. Aglietta and Ahn, \{E. J.\} and \{Al Samarai\}, I. and Albuquerque, \{I. F.M.\} and I. Allekotte and P. Allison and A. Almela and \{Alvarez Castillo\}, J. and J. Alvarez-Mu{\~n}iz and M. Ambrosio and Anastasi, \{G. A.\} and L. Anchordoqui and B. Andrada and S. Andringa and C. Aramo and F. Arqueros and N. Arsene and H. Asorey and P. Assis and J. Aublin and G. Avila and Badescu, \{A. M.\} and A. Balaceanu and C. Baus and Beatty, \{J. J.\} and Becker, \{K. H.\} and Bellido, \{J. A.\} and C. Berat and Bertaina, \{M. E.\} and X. Bertou and Biermann, \{P. L.\} and P. Billoir and J. Biteau and Blaess, \{S. G.\} and A. Blanco and J. Blazek and C. Bleve and M. Boh{\'a}{\v c}ov{\'a} and D. Boncioli and C. Bonifazi and N. Borodai and Botti, \{A. M.\} and J. Brack and I. Brancus and T. Bretz and S. Coutu and M. Mostaf{\'a}",

note = "Publisher Copyright: {\textcopyright} The Authors, published by EDP Sciences, 2017.; 6th Roma International Conference on Astroparticle Physics, RICAP 2016 ; Conference date: 21-06-2016 Through 24-06-2016",

year = "2017",

month = mar,

day = "23",

doi = "10.1051/epjconf/201713602002",

language = "English (US)",

volume = "136",

journal = "EPJ Web of Conferences",

issn = "2101-6275",

publisher = "EDP Sciences",

}

TY - JOUR

T1 - Astrophysical interpretation of Pierre Auger Observatory measurements of the UHECR energy spectrum and mass composition

AU - Pierre Auger Collaboration

AU - Di Matteo, Armando

AU - Aab, A.

AU - Abreu, P.

AU - Aglietta, M.

AU - Ahn, E. J.

AU - Al Samarai, I.

AU - Albuquerque, I. F.M.

AU - Allekotte, I.

AU - Allison, P.

AU - Almela, A.

AU - Alvarez Castillo, J.

AU - Alvarez-Muñiz, J.

AU - Ambrosio, M.

AU - Anastasi, G. A.

AU - Anchordoqui, L.

AU - Andrada, B.

AU - Andringa, S.

AU - Aramo, C.

AU - Arqueros, F.

AU - Arsene, N.

AU - Asorey, H.

AU - Assis, P.

AU - Aublin, J.

AU - Avila, G.

AU - Badescu, A. M.

AU - Balaceanu, A.

AU - Baus, C.

AU - Beatty, J. J.

AU - Becker, K. H.

AU - Bellido, J. A.

AU - Berat, C.

AU - Bertaina, M. E.

AU - Bertou, X.

AU - Biermann, P. L.

AU - Billoir, P.

AU - Biteau, J.

AU - Blaess, S. G.

AU - Blanco, A.

AU - Blazek, J.

AU - Bleve, C.

AU - Boháčová, M.

AU - Boncioli, D.

AU - Bonifazi, C.

AU - Borodai, N.

AU - Botti, A. M.

AU - Brack, J.

AU - Brancus, I.

AU - Bretz, T.

AU - Coutu, S.

AU - Mostafá, M.

PY - 2017/3/23

Y1 - 2017/3/23

N2 - We present a combined fit of a simple astrophysical model of UHECR sources to both the energy spectrum and mass composition data measured by the Pierre Auger Observatory. The fit has been performed for energies above 5 EeV, i.e. the region of the all-particle spectrum above the so-called "ankle"' feature. The astrophysical model we adopted consists of identical sources uniformly distributed in a comoving volume, where nuclei are accelerated with a rigidity-dependent mechanism. The fit results suggest sources characterized by relatively low maximum injection energies and hard spectral indices. The impact of various systematic uncertainties on the above result is discussed.

AB - We present a combined fit of a simple astrophysical model of UHECR sources to both the energy spectrum and mass composition data measured by the Pierre Auger Observatory. The fit has been performed for energies above 5 EeV, i.e. the region of the all-particle spectrum above the so-called "ankle"' feature. The astrophysical model we adopted consists of identical sources uniformly distributed in a comoving volume, where nuclei are accelerated with a rigidity-dependent mechanism. The fit results suggest sources characterized by relatively low maximum injection energies and hard spectral indices. The impact of various systematic uncertainties on the above result is discussed.

UR - https://www.scopus.com/pages/publications/85017110172

UR - https://www.scopus.com/pages/publications/85017110172#tab=citedBy

U2 - 10.1051/epjconf/201713602002

DO - 10.1051/epjconf/201713602002

M3 - Conference article

AN - SCOPUS:85017110172

SN - 2101-6275

VL - 136

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

M1 - 02002

T2 - 6th Roma International Conference on Astroparticle Physics, RICAP 2016

Y2 - 21 June 2016 through 24 June 2016

ER -

Astrophysical interpretation of Pierre Auger Observatory measurements of the UHECR energy spectrum and mass composition

Abstract

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