The Extremely High Energy Cosmic Rays
Experimental results from Haverah Park, Yakutsk, AGASA and Fly's Eye are reviewed. All these experiments work in the energy range above 0.1 EeV. The 'dip' structure around 3 EeV in the energy spectrum is well established by all the experiments, though the exact position differs slight...
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ftcern:oai:cds.cern.ch:346674 2023-05-15T18:45:23+02:00 The Extremely High Energy Cosmic Rays Yoshida, S Dai, H 1998 http://cds.cern.ch/record/346674 eng eng http://cds.cern.ch/record/346674 astro-ph/9802294 oai:cds.cern.ch:346674 Astrophysics and Astronomy 1998 ftcern 2018-07-28T03:34:19Z Experimental results from Haverah Park, Yakutsk, AGASA and Fly's Eye are reviewed. All these experiments work in the energy range above 0.1 EeV. The 'dip' structure around 3 EeV in the energy spectrum is well established by all the experiments, though the exact position differs slightly. Fly's Eye and Yakutsk results on the chemical composition indicate that the cosmic rays are getting lighter over the energy range from 0.1 EeV to 10 EeV, but the exact fraction is hadronic interaction model dependent, as indicated by the AGASA analysis. The arrival directions of cosmic rays are largely isotropic, but interesting features may be starting to emerge. Most of the experimental results can best be explained with the scenario that an extragalactic component gradually takes over a galactic population as energy increases and cosmic rays at the highest energies are dominated by particles coming from extragalactic space. However, identification of the extragalactic sources has not yet been successful because of limited statistics and the resolution of the data. Other/Unknown Material Yakutsk CERN Document Server (CDS) Yakutsk |
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CERN Document Server (CDS) |
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ftcern |
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English |
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Astrophysics and Astronomy |
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Astrophysics and Astronomy Yoshida, S Dai, H The Extremely High Energy Cosmic Rays |
topic_facet |
Astrophysics and Astronomy |
description |
Experimental results from Haverah Park, Yakutsk, AGASA and Fly's Eye are reviewed. All these experiments work in the energy range above 0.1 EeV. The 'dip' structure around 3 EeV in the energy spectrum is well established by all the experiments, though the exact position differs slightly. Fly's Eye and Yakutsk results on the chemical composition indicate that the cosmic rays are getting lighter over the energy range from 0.1 EeV to 10 EeV, but the exact fraction is hadronic interaction model dependent, as indicated by the AGASA analysis. The arrival directions of cosmic rays are largely isotropic, but interesting features may be starting to emerge. Most of the experimental results can best be explained with the scenario that an extragalactic component gradually takes over a galactic population as energy increases and cosmic rays at the highest energies are dominated by particles coming from extragalactic space. However, identification of the extragalactic sources has not yet been successful because of limited statistics and the resolution of the data. |
author |
Yoshida, S Dai, H |
author_facet |
Yoshida, S Dai, H |
author_sort |
Yoshida, S |
title |
The Extremely High Energy Cosmic Rays |
title_short |
The Extremely High Energy Cosmic Rays |
title_full |
The Extremely High Energy Cosmic Rays |
title_fullStr |
The Extremely High Energy Cosmic Rays |
title_full_unstemmed |
The Extremely High Energy Cosmic Rays |
title_sort |
extremely high energy cosmic rays |
publishDate |
1998 |
url |
http://cds.cern.ch/record/346674 |
geographic |
Yakutsk |
geographic_facet |
Yakutsk |
genre |
Yakutsk |
genre_facet |
Yakutsk |
op_relation |
http://cds.cern.ch/record/346674 astro-ph/9802294 oai:cds.cern.ch:346674 |
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1766236434991153152 |