Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory

The Pierre Auger Collaboration has reported. evidence for anisotropy in the distribution of arrival directions of the cosmic rays with energies E > E-th = 5.5 x 10(19) eV. These show a correlation with the distribution of nearby extragalactic objects, including an apparent excess around the direc...

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Detalles Bibliográficos
Autores principales: Dova, María Teresa, Gómez Albarracín, Flavia Alejandra, Hansen, Patricia María, Jarne, Cecilia Gisele, Mariazzi, Analisa Gabriela, Moreno, Juan Cruz, Sciutto, Sergio Juan, Wahlberg, Hernán Pablo, The Pierre Auger Collaboration
Formato: Articulo Preprint
Lenguaje:Español
Publicado: 2011
Materias:
Astronomía
Física
anisotropy
cosmic rays
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/139538
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-139538
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Español
topic Astronomía
Física
anisotropy
cosmic rays
spellingShingle Astronomía
Física
anisotropy
cosmic rays
Dova, María Teresa
Gómez Albarracín, Flavia Alejandra
Hansen, Patricia María
Jarne, Cecilia Gisele
Mariazzi, Analisa Gabriela
Moreno, Juan Cruz
Sciutto, Sergio Juan
Wahlberg, Hernán Pablo
The Pierre Auger Collaboration
Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory
topic_facet Astronomía
Física
anisotropy
cosmic rays
description The Pierre Auger Collaboration has reported. evidence for anisotropy in the distribution of arrival directions of the cosmic rays with energies E > E-th = 5.5 x 10(19) eV. These show a correlation with the distribution of nearby extragalactic objects, including an apparent excess around the direction of Centaurus A. If the particles responsible for these excesses at E > E-th are heavy nuclei with charge Z, the proton component of the sources should lead to excesses in the same regions at energies E/Z. We here report the lack of anisotropies in these directions at energies above E-th/Z (for illustrative values of Z = 6, 13, 26). If the anisotropies above E-th are due to nuclei with charge Z, and under reasonable assumptions about the acceleration process, these observations imply stringent constraints on the allowed proton fraction at the lower energies.
format Articulo
Preprint
author Dova, María Teresa
Gómez Albarracín, Flavia Alejandra
Hansen, Patricia María
Jarne, Cecilia Gisele
Mariazzi, Analisa Gabriela
Moreno, Juan Cruz
Sciutto, Sergio Juan
Wahlberg, Hernán Pablo
The Pierre Auger Collaboration
author_facet Dova, María Teresa
Gómez Albarracín, Flavia Alejandra
Hansen, Patricia María
Jarne, Cecilia Gisele
Mariazzi, Analisa Gabriela
Moreno, Juan Cruz
Sciutto, Sergio Juan
Wahlberg, Hernán Pablo
The Pierre Auger Collaboration
author_sort Dova, María Teresa
title Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory
title_short Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory
title_full Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory
title_fullStr Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory
title_full_unstemmed Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory
title_sort anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the pierre auger observatory
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/139538
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