Update on the correlation of the highest energy cosmic rays with nearby extragalactic matter
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , |
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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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. Abreu.pdf: 1242220 bytes, checksum: a454243b74a6a0a4a48ecc51334bb68e (MD5)Rejected by Alda Lima da Silva(sivalda@ufba.br), reason: Material de Física on 2013-08-16T19:17:40Z (GMT)Submitted by Suelen Reis (suziy.ellen@gmail.com) on 2013-08-27T11:13:32Z No. of bitstreams: 1 P. Abreu.pdf: 1242220 bytes, checksum: a454243b74a6a0a4a48ecc51334bb68e (MD5)Approved for entry into archive by Rodrigo Meirelles(rodrigomei@ufba.br) on 2013-09-04T20:39:25Z (GMT) No. of bitstreams: 1 P. Abreu.pdf: 1242220 bytes, checksum: a454243b74a6a0a4a48ecc51334bb68e (MD5)Made available in DSpace on 2013-09-04T20:39:25Z (GMT). No. of bitstreams: 1 P. 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 |
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info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/article |
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article |
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publishedVersion |
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http://www.repositorio.ufba.br/ri/handle/ri/12845 |
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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 |
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eng |
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