Combined fit of the energy spectrum and mass composition across the ankle with the data measured at the Pierre Auger Observatory

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F22%3A00564849" target="_blank" >RIV/68378271:_____/22:00564849 - isvavai.cz</a>
Alternative codes found
RIV/61989592:15310/22:73616913
Result on the web
<a href="https://pos.sissa.it/395/311/pdf" target="_blank" >https://pos.sissa.it/395/311/pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.22323/1.395.0311" target="_blank" >10.22323/1.395.0311</a>

Result language
angličtina
Original language name
Combined fit of the energy spectrum and mass composition across the ankle with the data measured at the Pierre Auger Observatory
Original language description
The combined fit of the energy spectrum and mass composition data above 5 EeV suggested the presence of extragalactic sources ejecting ultra-high-energy cosmic rays with relatively low maximum energies, hard spectral indices and mixed chemical compositions, dominated by the contribution of intermediate mass groups. Here we present an extension of the fit to lower energies, to include the feature observed near 5 EeV in the all-particle energy spectrum, the so-called ankle. We show that it is possible to generate such a change of slope assuming that the flux below the ankle is provided by the superposition of different contributions. The simplest extension of this sort consists of introducing a supplemental extragalactic component at low energy, characterised by different physical parameters with respect to the one being dominant above the ankle: such a component may originate from a different population of sources or be provided by interactions occurring in the acceleration sites.
Czech name
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Czech description
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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