Unmasking the ultrahigh-energy cosmic ray origin

0549693 - FZÚ 2022 RIV IT eng C - Conference Paper (international conference)
Anchordoqui, L. A.
Unmasking the ultrahigh-energy cosmic ray origin.
Proceedings of Science. Vol. 314. Trieste: Sissa Medilab srl, 2018, s. 1-4, č. článku 0001. ISSN 1824-8039.
[The European Physical Society Conference on High Energy Physics (EPS-HEP2017). Venice (IT), 05.07.2017-12.07.2017]
Research Infrastructure: AUGER-CZ - 90038
Keywords : ultrahigh-energy cosmic ray * photo-disintegration
OECD category: Particles and field physics
https://pos.sissa.it/314/001/pdf

The sharp change in slope of the ultrahigh-energy cosmic ray spectrum around 109.6 GeV (the ankle), combined with evidence of a light but extragalactic component near and below the ankle which evolves to intermediate/heavy composition above, has proved exceedingly challenging to understand theoretically. Recently, we introduced a very general model in which, for a range of source conditions, photo-disintegration of ultrahigh-energy nuclei in the region surrounding the accelerator naturally accounts for the observed spectrum and composition of the entire extragalactic component, which dominates above about 108.5 GeV. In this communication we review the generalities of the model and show that starburst galaxies provide a compelling source example.
Permanent Link: http://hdl.handle.net/11104/0325637