A correlation between the highest energy cosmic rays and nearby active galactic nuclei detected by Fermi
Autor(a) principal: | |
---|---|
Data de Publicação: | 2010 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/108984 |
Resumo: | We analyze the correlation of the positions of γ -ray sources in the Fermi Large Area Telescope (LAT) First Source Catalog (1FGL) and the First LAT Active Galactic Nuclei (AGNs) Catalog (1LAC) with the arrival directions of ultra-high-energy cosmic rays (UHECRs) observed with the Pierre Auger Observatory, in order to investigate the origin of UHECRs.We find that Galactic sources and blazars identified in the 1FGL are not significantly correlated with UHECRs, while the 1LAC sources display a mild correlation (2.6σ level) on an ≈2°.4 angular scale. When selecting only the 1LAC AGNs closer than 200 Mpc, we find a strong association (5.4σ) between their positions and the directions of UHECRs on an ≈17°. angular scale; the probability of the observed configuration being due to an isotropic flux of cosmic rays is 5×10−8. There is also a 5σ correlation with nearby 1LAC sources on a 6°.5 scale.We identify seven “γ -ray loud” AGNs which are associated with UHECRs within ≈17°. and are likely candidates for the production sites of UHECRs: Centaurus A, NGC 4945, ESO 323−G77, 4C+04.77, NGC 1218, RX J0008.0+1450, and NGC 253.We interpret these results as providing additional support to the hypothesis of the origin of UHECRs in nearby extragalactic objects. As the angular scales of the correlations are large, we discuss the possibility that intervening magnetic fields might be considerably deflecting the trajectories of the particles on their way to Earth. |
id |
UFRGS-2_0e80a92c13553652939e53ddb299f28a |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/108984 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Nemmen, Rodrigo S.Bonatto, Charles JoseStorchi-Bergmann, Thaisa2015-01-15T02:15:14Z20100004-637Xhttp://hdl.handle.net/10183/108984000766325We analyze the correlation of the positions of γ -ray sources in the Fermi Large Area Telescope (LAT) First Source Catalog (1FGL) and the First LAT Active Galactic Nuclei (AGNs) Catalog (1LAC) with the arrival directions of ultra-high-energy cosmic rays (UHECRs) observed with the Pierre Auger Observatory, in order to investigate the origin of UHECRs.We find that Galactic sources and blazars identified in the 1FGL are not significantly correlated with UHECRs, while the 1LAC sources display a mild correlation (2.6σ level) on an ≈2°.4 angular scale. When selecting only the 1LAC AGNs closer than 200 Mpc, we find a strong association (5.4σ) between their positions and the directions of UHECRs on an ≈17°. angular scale; the probability of the observed configuration being due to an isotropic flux of cosmic rays is 5×10−8. There is also a 5σ correlation with nearby 1LAC sources on a 6°.5 scale.We identify seven “γ -ray loud” AGNs which are associated with UHECRs within ≈17°. and are likely candidates for the production sites of UHECRs: Centaurus A, NGC 4945, ESO 323−G77, 4C+04.77, NGC 1218, RX J0008.0+1450, and NGC 253.We interpret these results as providing additional support to the hypothesis of the origin of UHECRs in nearby extragalactic objects. As the angular scales of the correlations are large, we discuss the possibility that intervening magnetic fields might be considerably deflecting the trajectories of the particles on their way to Earth.application/pdfengThe astrophysical journal. Bristol. Vol. 722, no. 1 (Oct. 2010), p. 281-288Galáxias ativasOrigem de raios cósmicosNucleo galaticoQuasarsCosmic raysGalaxies: activeGalaxies: jetsGamma rays: generalA correlation between the highest energy cosmic rays and nearby active galactic nuclei detected by FermiEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000766325.pdf000766325.pdfTexto completo (inglês)application/pdf513332http://www.lume.ufrgs.br/bitstream/10183/108984/1/000766325.pdf06a2422485f10be942288e4c016a9428MD51TEXT000766325.pdf.txt000766325.pdf.txtExtracted Texttext/plain42803http://www.lume.ufrgs.br/bitstream/10183/108984/2/000766325.pdf.txt989deeb85d3d9d40394d43584a65622dMD52THUMBNAIL000766325.pdf.jpg000766325.pdf.jpgGenerated Thumbnailimage/jpeg2226http://www.lume.ufrgs.br/bitstream/10183/108984/3/000766325.pdf.jpg7e7eb9df3c0ae655859457eebea69851MD5310183/1089842023-07-15 03:28:57.706112oai:www.lume.ufrgs.br:10183/108984Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-15T06:28:57Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
A correlation between the highest energy cosmic rays and nearby active galactic nuclei detected by Fermi |
title |
A correlation between the highest energy cosmic rays and nearby active galactic nuclei detected by Fermi |
spellingShingle |
A correlation between the highest energy cosmic rays and nearby active galactic nuclei detected by Fermi Nemmen, Rodrigo S. Galáxias ativas Origem de raios cósmicos Nucleo galatico Quasars Cosmic rays Galaxies: active Galaxies: jets Gamma rays: general |
title_short |
A correlation between the highest energy cosmic rays and nearby active galactic nuclei detected by Fermi |
title_full |
A correlation between the highest energy cosmic rays and nearby active galactic nuclei detected by Fermi |
title_fullStr |
A correlation between the highest energy cosmic rays and nearby active galactic nuclei detected by Fermi |
title_full_unstemmed |
A correlation between the highest energy cosmic rays and nearby active galactic nuclei detected by Fermi |
title_sort |
A correlation between the highest energy cosmic rays and nearby active galactic nuclei detected by Fermi |
author |
Nemmen, Rodrigo S. |
author_facet |
Nemmen, Rodrigo S. Bonatto, Charles Jose Storchi-Bergmann, Thaisa |
author_role |
author |
author2 |
Bonatto, Charles Jose Storchi-Bergmann, Thaisa |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Nemmen, Rodrigo S. Bonatto, Charles Jose Storchi-Bergmann, Thaisa |
dc.subject.por.fl_str_mv |
Galáxias ativas Origem de raios cósmicos Nucleo galatico Quasars |
topic |
Galáxias ativas Origem de raios cósmicos Nucleo galatico Quasars Cosmic rays Galaxies: active Galaxies: jets Gamma rays: general |
dc.subject.eng.fl_str_mv |
Cosmic rays Galaxies: active Galaxies: jets Gamma rays: general |
description |
We analyze the correlation of the positions of γ -ray sources in the Fermi Large Area Telescope (LAT) First Source Catalog (1FGL) and the First LAT Active Galactic Nuclei (AGNs) Catalog (1LAC) with the arrival directions of ultra-high-energy cosmic rays (UHECRs) observed with the Pierre Auger Observatory, in order to investigate the origin of UHECRs.We find that Galactic sources and blazars identified in the 1FGL are not significantly correlated with UHECRs, while the 1LAC sources display a mild correlation (2.6σ level) on an ≈2°.4 angular scale. When selecting only the 1LAC AGNs closer than 200 Mpc, we find a strong association (5.4σ) between their positions and the directions of UHECRs on an ≈17°. angular scale; the probability of the observed configuration being due to an isotropic flux of cosmic rays is 5×10−8. There is also a 5σ correlation with nearby 1LAC sources on a 6°.5 scale.We identify seven “γ -ray loud” AGNs which are associated with UHECRs within ≈17°. and are likely candidates for the production sites of UHECRs: Centaurus A, NGC 4945, ESO 323−G77, 4C+04.77, NGC 1218, RX J0008.0+1450, and NGC 253.We interpret these results as providing additional support to the hypothesis of the origin of UHECRs in nearby extragalactic objects. As the angular scales of the correlations are large, we discuss the possibility that intervening magnetic fields might be considerably deflecting the trajectories of the particles on their way to Earth. |
publishDate |
2010 |
dc.date.issued.fl_str_mv |
2010 |
dc.date.accessioned.fl_str_mv |
2015-01-15T02:15:14Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/108984 |
dc.identifier.issn.pt_BR.fl_str_mv |
0004-637X |
dc.identifier.nrb.pt_BR.fl_str_mv |
000766325 |
identifier_str_mv |
0004-637X 000766325 |
url |
http://hdl.handle.net/10183/108984 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The astrophysical journal. Bristol. Vol. 722, no. 1 (Oct. 2010), p. 281-288 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRGS instname:Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
instname_str |
Universidade Federal do Rio Grande do Sul (UFRGS) |
instacron_str |
UFRGS |
institution |
UFRGS |
reponame_str |
Repositório Institucional da UFRGS |
collection |
Repositório Institucional da UFRGS |
bitstream.url.fl_str_mv |
http://www.lume.ufrgs.br/bitstream/10183/108984/1/000766325.pdf http://www.lume.ufrgs.br/bitstream/10183/108984/2/000766325.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/108984/3/000766325.pdf.jpg |
bitstream.checksum.fl_str_mv |
06a2422485f10be942288e4c016a9428 989deeb85d3d9d40394d43584a65622d 7e7eb9df3c0ae655859457eebea69851 |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS) |
repository.mail.fl_str_mv |
|
_version_ |
1801224862808670208 |