Do Ultrahigh Energy Cosmic Rays Come from Active Galactic Nuclei and Fermi $γ$-ray Sources?
We study possible correlations between ultrahigh energy cosmic rays (UHECRs), observed by Auger, AGASA and Yakutsk, and nearby active galactic nuclei (AGNs) and $Fermi$ sources. We consider the deflection effects by a Galactic magnetic field (GMF) model constrained by the most updated measurements....
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ftdatacite:10.48550/arxiv.1004.1877 2023-05-15T18:45:21+02:00 Do Ultrahigh Energy Cosmic Rays Come from Active Galactic Nuclei and Fermi $γ$-ray Sources? Jiang, Yun-Ying Hou, L. G. Han, J. L. Sun, X. H. Wang, Wei 2010 https://dx.doi.org/10.48550/arxiv.1004.1877 https://arxiv.org/abs/1004.1877 unknown arXiv https://dx.doi.org/10.1088/0004-637x/719/1/459 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ High Energy Astrophysical Phenomena astro-ph.HE FOS Physical sciences article-journal Article ScholarlyArticle Text 2010 ftdatacite https://doi.org/10.48550/arxiv.1004.1877 https://doi.org/10.1088/0004-637x/719/1/459 2022-04-01T14:34:22Z We study possible correlations between ultrahigh energy cosmic rays (UHECRs), observed by Auger, AGASA and Yakutsk, and nearby active galactic nuclei (AGNs) and $Fermi$ sources. We consider the deflection effects by a Galactic magnetic field (GMF) model constrained by the most updated measurements. We found that the average deflection angles of UHECRs by the Galactic magnetic fields are less than $4^\circ$. A correlation between the Auger cosmic-ray events and nearby AGNs with a significance level of $\sim 4σ$ was found for the Auger UHECR data sets with or without deflection correction. No correlation was found between the AGASA/Yakutsk events with nearby AGNs. Marginal correlations between the Auger events and the $Fermi$ sources, and between AGASA events and $Fermi$ AGNs were found when the deflections calculated by the GMF model were considered. However, no correlation was found between the Yakutsk data and $Fermi$ sources. Some $Fermi$ sources are close to the arrival directions of UHECR events detected by Auger, AGASA, and Yakutsk, most of which are probably chance coincidence rather than objects producing UHECRs in the nearby Universe. Four $Fermi$ sources, NGC 4945, ESO 323-G77, NGC 6951, and Cen A, within 100~Mpc have UHECR events within $3.1^{\circ}$ from their positions, which could potentially be cosmic ray accelerators. However, the association can only be confirmed if more UHECRs are preferably detected in these directions. : 10 pages, 8 figures, 1 table. Published version Text Yakutsk DataCite Metadata Store (German National Library of Science and Technology) Yakutsk |
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DataCite Metadata Store (German National Library of Science and Technology) |
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High Energy Astrophysical Phenomena astro-ph.HE FOS Physical sciences |
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High Energy Astrophysical Phenomena astro-ph.HE FOS Physical sciences Jiang, Yun-Ying Hou, L. G. Han, J. L. Sun, X. H. Wang, Wei Do Ultrahigh Energy Cosmic Rays Come from Active Galactic Nuclei and Fermi $γ$-ray Sources? |
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High Energy Astrophysical Phenomena astro-ph.HE FOS Physical sciences |
description |
We study possible correlations between ultrahigh energy cosmic rays (UHECRs), observed by Auger, AGASA and Yakutsk, and nearby active galactic nuclei (AGNs) and $Fermi$ sources. We consider the deflection effects by a Galactic magnetic field (GMF) model constrained by the most updated measurements. We found that the average deflection angles of UHECRs by the Galactic magnetic fields are less than $4^\circ$. A correlation between the Auger cosmic-ray events and nearby AGNs with a significance level of $\sim 4σ$ was found for the Auger UHECR data sets with or without deflection correction. No correlation was found between the AGASA/Yakutsk events with nearby AGNs. Marginal correlations between the Auger events and the $Fermi$ sources, and between AGASA events and $Fermi$ AGNs were found when the deflections calculated by the GMF model were considered. However, no correlation was found between the Yakutsk data and $Fermi$ sources. Some $Fermi$ sources are close to the arrival directions of UHECR events detected by Auger, AGASA, and Yakutsk, most of which are probably chance coincidence rather than objects producing UHECRs in the nearby Universe. Four $Fermi$ sources, NGC 4945, ESO 323-G77, NGC 6951, and Cen A, within 100~Mpc have UHECR events within $3.1^{\circ}$ from their positions, which could potentially be cosmic ray accelerators. However, the association can only be confirmed if more UHECRs are preferably detected in these directions. : 10 pages, 8 figures, 1 table. Published version |
format |
Text |
author |
Jiang, Yun-Ying Hou, L. G. Han, J. L. Sun, X. H. Wang, Wei |
author_facet |
Jiang, Yun-Ying Hou, L. G. Han, J. L. Sun, X. H. Wang, Wei |
author_sort |
Jiang, Yun-Ying |
title |
Do Ultrahigh Energy Cosmic Rays Come from Active Galactic Nuclei and Fermi $γ$-ray Sources? |
title_short |
Do Ultrahigh Energy Cosmic Rays Come from Active Galactic Nuclei and Fermi $γ$-ray Sources? |
title_full |
Do Ultrahigh Energy Cosmic Rays Come from Active Galactic Nuclei and Fermi $γ$-ray Sources? |
title_fullStr |
Do Ultrahigh Energy Cosmic Rays Come from Active Galactic Nuclei and Fermi $γ$-ray Sources? |
title_full_unstemmed |
Do Ultrahigh Energy Cosmic Rays Come from Active Galactic Nuclei and Fermi $γ$-ray Sources? |
title_sort |
do ultrahigh energy cosmic rays come from active galactic nuclei and fermi $γ$-ray sources? |
publisher |
arXiv |
publishDate |
2010 |
url |
https://dx.doi.org/10.48550/arxiv.1004.1877 https://arxiv.org/abs/1004.1877 |
geographic |
Yakutsk |
geographic_facet |
Yakutsk |
genre |
Yakutsk |
genre_facet |
Yakutsk |
op_relation |
https://dx.doi.org/10.1088/0004-637x/719/1/459 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1004.1877 https://doi.org/10.1088/0004-637x/719/1/459 |
_version_ |
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