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Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory

2017-04-20Journal article Open access
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dc.contributor.authorPierre Auger collaboration (399 authors)
dc.contributor.authorAbreu, Pedro
dc.contributor.authorAndringa, Sofia
dc.contributor.authorAssis, Pedro
dc.contributor.authorBarreira Luz, Ricardo Jorge
dc.contributor.authorBlanco, Alberto
dc.contributor.authorCazon, Lorenzo
dc.contributor.authorConceição, Ruben
dc.contributor.authorDiogo, Francisco
dc.contributor.authorEspadanal, João
dc.contributor.authorLopes, Luis
dc.contributor.authorPimenta, Mário
dc.contributor.authorSantos, Eva
dc.contributor.authorSarmento, Raul
dc.contributor.authorTomé, Bernardo
dc.date.accessioned2019-02-04T12:00:06Z
dc.date.available2019-02-04T12:00:06Z
dc.date.issued2017-04-20
dc.date.updated2019-02-04T12:00:06Z
dc.description.abstractWe 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 ⋅ 10(18) eV, 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 through a rigidity-dependent mechanism. The fit results suggest sources characterized by relatively low maximum injection energies, hard spectra and heavy chemical composition. We also show that uncertainties about physical quantities relevant to UHECR propagation and shower development have a non-negligible impact on the fit results.
dc.description.versionPeer Reviewed
dc.identifierJCAP 1803 (2018) E02; DOI 10.1088/1475-7516/2017/04/038, 10.1088/1475-7516/2018/03/E02
dc.identifier.urihttp://dx.doi.org/10.1088/1475-7516/2017/04/038, 10.1088/1475-7516/2018/03/E02
dc.identifier.urihttp://hdl.handle.net/10400.26/27256
dc.language.isoeng
dc.titleCombined fit of spectrum and composition data as measured by the Pierre Auger Observatory
dc.typejournal article
dspace.entity.typePublication
rcaap.rightsopenAccesspt
rcaap.typearticle

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