Artículo
The flux suppression at the highest energies
Título:
La suppression du flux aux plus hautes énergies
Fecha de publicación:
03/2014
Editorial:
Elsevier Masson
Revista:
Comptes Rendus Physique
ISSN:
1631-0705
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Almost half a century ago, Greisen, Zatsepin and Kuz’min (GZK) predicted a “cosmologically meaningful termination” of the spectrum of cosmic rays at energies around 1020 eV due to their interaction with the cosmic microwave background, as they propagate from distant extragalactic sources. A suppression of the flux above 4×1019 eV is now confirmed. We argue that current data are insufficient to conclude whether the observed feature is due to energy-loss during propagation, or else because the astrophysical accelerators reach their limit, or indeed to a combination of both source properties and propagation effects. We discuss the dependence of the spectral steepening upon the cosmic-ray composition, source properties, and intervening magnetic fields, and speculate on the additional information that may be necessary to reach unambiguous conclusions about the origin of the flux suppression and of the mechanisms behind the acceleration of cosmic rays up to the highest observed energies.
Palabras clave:
Cosmic Rays
,
Ultra High Energy
,
Gzk
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Colecciones
Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Citación
Harari, Diego Dario; The flux suppression at the highest energies; Elsevier Masson; Comptes Rendus Physique; 15; 4; 3-2014; 376-383
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