Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter

Detalhes bibliográficos
Autor(a) principal: Abreu, P.
Data de Publicação: 2010
Outros Autores: Aglietta, M., Ahn, E. J., Allard, D., Pepe, Iuri Muniz
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/12845
Resumo: p. 314–326
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spelling Abreu, P.Aglietta, M.Ahn, E. J.Allard, D.Pepe, Iuri MunizAbreu, P.Aglietta, M.Ahn, E. J.Allard, D.Pepe, Iuri Muniz2013-09-04T20:39:25Z20100927-6505http://www.repositorio.ufba.br/ri/handle/ri/12845v. 34, n. 5p. 314–326Data collected by the Pierre Auger Observatory through 31 August 2007 showed evidence for anisotropy in the arrival directions of cosmic rays above the Greisen–Zatsepin–Kuz’min energy threshold, 6 × 1019 eV. The anisotropy was measured by the fraction of arrival directions that are less than 3.1° from the position of an active galactic nucleus within 75 Mpc (using the Véron-Cetty and Véron 12th catalog). An updated measurement of this fraction is reported here using the arrival directions of cosmic rays recorded above the same energy threshold through 31 December 2009. The number of arrival directions has increased from 27 to 69, allowing a more precise measurement. The correlating fraction is View the MathML source38-6+7%, compared with 21% expected for isotropic cosmic rays. This is down from the early estimate of View the MathML source69-13+11%. The enlarged set of arrival directions is examined also in relation to other populations of nearby extragalactic objects: galaxies in the 2 Microns All Sky Survey and active galactic nuclei detected in hard X-rays by the Swift Burst Alert Telescope. A celestial region around the position of the radiogalaxy Cen A has the largest excess of arrival directions relative to isotropic expectations. The 2-point autocorrelation function is shown for the enlarged set of arrival directions and compared to the isotropic expectation.Submitted by Suelen Reis (suziy.ellen@gmail.com) on 2013-06-17T15:26:08Z No. of bitstreams: 1 P. 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Abreu.pdf: 1242220 bytes, checksum: a454243b74a6a0a4a48ecc51334bb68e (MD5) Previous issue date: 2010http://ac.els-cdn.com.ez10.periodicos.capes.gov.br/S0927650510001696/1-s2.0-S0927650510001696-main.pdf?_tid=99533c78-d761-11e2-b80d-00000aacb360&acdnat=1371482676_ffc95ab6b0329822fee1ceb505dd8a1breponame:Repositório Institucional da UFBAinstname:Universidade Federal da Bahia (UFBA)instacron:UFBACosmic raysUHECRAnisotropyPierre Auger ObservatoryExtra-galacticGZKUpdate on the correlation of the highest energy cosmic rays with nearby extragalactic matterAstroparticle Physicsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10000-01-01enginfo:eu-repo/semantics/openAccessORIGINALP. Abreu.pdfP. Abreu.pdfapplication/pdf1242220https://repositorio.ufba.br/bitstream/ri/12845/1/P.%20Abreu.pdfa454243b74a6a0a4a48ecc51334bb68eMD51LICENSElicense.txtlicense.txttext/plain1762https://repositorio.ufba.br/bitstream/ri/12845/2/license.txt1b89a9a0548218172d7c829f87a0eab9MD52TEXTP. 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dc.title.pt_BR.fl_str_mv Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter
dc.title.alternative.pt_BR.fl_str_mv Astroparticle Physics
title Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter
spellingShingle Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter
Abreu, P.
Cosmic rays
UHECR
Anisotropy
Pierre Auger Observatory
Extra-galactic
GZK
title_short Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter
title_full Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter
title_fullStr Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter
title_full_unstemmed Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter
title_sort Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter
author Abreu, P.
author_facet Abreu, P.
Aglietta, M.
Ahn, E. J.
Allard, D.
Pepe, Iuri Muniz
author_role author
author2 Aglietta, M.
Ahn, E. J.
Allard, D.
Pepe, Iuri Muniz
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Abreu, P.
Aglietta, M.
Ahn, E. J.
Allard, D.
Pepe, Iuri Muniz
Abreu, P.
Aglietta, M.
Ahn, E. J.
Allard, D.
Pepe, Iuri Muniz
dc.subject.por.fl_str_mv Cosmic rays
UHECR
Anisotropy
Pierre Auger Observatory
Extra-galactic
GZK
topic Cosmic rays
UHECR
Anisotropy
Pierre Auger Observatory
Extra-galactic
GZK
description p. 314–326
publishDate 2010
dc.date.issued.fl_str_mv 2010
dc.date.accessioned.fl_str_mv 2013-09-04T20:39:25Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
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dc.identifier.uri.fl_str_mv http://www.repositorio.ufba.br/ri/handle/ri/12845
dc.identifier.issn.none.fl_str_mv 0927-6505
dc.identifier.number.pt_BR.fl_str_mv v. 34, n. 5
identifier_str_mv 0927-6505
v. 34, n. 5
url http://www.repositorio.ufba.br/ri/handle/ri/12845
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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