Observation of a large-scale anisotropy in the arrival directions of cosmic rays above 8 × 10 18 eV

Cosmic rays are atomic nuclei arriving from outer space that reach the highest energies observed in nature. Clues to their origin come from studying the distribution of their arrival directions. Using 3 × 10 4 cosmic rays with energies above 8 × 10 18 electron volts, recorded with the Pierre Auger O...

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Detalles Bibliográficos
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:Inglés
Publicado: 2017
Materias:
Física
Large-scale anisotropy
Cosmic rays
Pierre Auger observatory
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/78400
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-78400
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Física
Large-scale anisotropy
Cosmic rays
Pierre Auger observatory
spellingShingle Física
Física
Large-scale anisotropy
Cosmic rays
Pierre Auger observatory
Dova, María Teresa
Hansen, Patricia María
Mariazzi, Analisa Gabriela
Sciutto, Sergio Juan
Vergara Quispe, Indira Dajhana
Wahlberg, Hernán Pablo
The Pierre Auger Collaboration
Observation of a large-scale anisotropy in the arrival directions of cosmic rays above 8 × 10 18 eV
topic_facet Física
Física
Large-scale anisotropy
Cosmic rays
Pierre Auger observatory
description Cosmic rays are atomic nuclei arriving from outer space that reach the highest energies observed in nature. Clues to their origin come from studying the distribution of their arrival directions. Using 3 × 10 4 cosmic rays with energies above 8 × 10 18 electron volts, recorded with the Pierre Auger Observatory from a total exposure of 76,800 km2 sr year, we determined the existence of anisotropy in arrival directions. The anisotropy, detected at more than a 5.2σ level of significance, can be described by a dipole with an amplitude of 6.5 +1.3 -0.9 percent toward right ascension αd = 100 ± 10 degrees and declination δd = -24 +12 -13 degrees. That direction indicates an extragalactic origin for these ultrahighenergy particles.
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 Observation of a large-scale anisotropy in the arrival directions of cosmic rays above 8 × 10 18 eV
title_short Observation of a large-scale anisotropy in the arrival directions of cosmic rays above 8 × 10 18 eV
title_full Observation of a large-scale anisotropy in the arrival directions of cosmic rays above 8 × 10 18 eV
title_fullStr Observation of a large-scale anisotropy in the arrival directions of cosmic rays above 8 × 10 18 eV
title_full_unstemmed Observation of a large-scale anisotropy in the arrival directions of cosmic rays above 8 × 10 18 eV
title_sort observation of a large-scale anisotropy in the arrival directions of cosmic rays above 8 × 10 18 ev
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/78400
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