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

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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 · 10<sup>18</sup> eV, i.e. the region of the all-particle spectrum ab...

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Autores principales:	Dova, María Teresa, Hansen, Patricia María, Mariazzi, Analisa Gabriela, Sciutto, Sergio Juan, Vergara Quispe, Indira Dajhana, Wahlberg, Hernán Pablo, The Pierre Auger Collaboration
Formato:	Articulo
Lenguaje:	Español
Publicado:	2017
Materias:	Ciencias Exactas Física ultra high energy cosmic rays cosmic ray experiments cosmic ray theory intergalactic media
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/81268
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-81268
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Español
topic	Ciencias Exactas Física ultra high energy cosmic rays cosmic ray experiments cosmic ray theory intergalactic media
spellingShingle	Ciencias Exactas Física ultra high energy cosmic rays cosmic ray experiments cosmic ray theory intergalactic media Dova, María Teresa Hansen, Patricia María Mariazzi, Analisa Gabriela Sciutto, Sergio Juan Vergara Quispe, Indira Dajhana Wahlberg, Hernán Pablo The Pierre Auger Collaboration Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory
topic_facet	Ciencias Exactas Física ultra high energy cosmic rays cosmic ray experiments cosmic ray theory intergalactic media
description	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 · 10<sup>18</sup> 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.
format	Articulo Articulo
author	Dova, María Teresa Hansen, Patricia María Mariazzi, Analisa Gabriela Sciutto, Sergio Juan Vergara Quispe, Indira Dajhana Wahlberg, Hernán Pablo The Pierre Auger Collaboration
author_facet	Dova, María Teresa Hansen, Patricia María Mariazzi, Analisa Gabriela Sciutto, Sergio Juan Vergara Quispe, Indira Dajhana Wahlberg, Hernán Pablo The Pierre Auger Collaboration
author_sort	Dova, María Teresa
title	Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory
title_short	Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory
title_full	Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory
title_fullStr	Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory
title_full_unstemmed	Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory
title_sort	combined fit of spectrum and composition data as measured by the pierre auger observatory
publishDate	2017
url	http://sedici.unlp.edu.ar/handle/10915/81268
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bdutipo_str	Repositorios
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Combined fit of spectrum and composition data as measured by the Pierre Auger Observatory

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