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Ultrahigh energy cosmic rays as heavy nuclei from cluster accretion shocks

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arxiv astro-ph/0701167 v3 pith:QYK6ZSCN submitted 2007-01-07 astro-ph

classification astro-ph
keywords compositionenergynucleiaccretioncosmiccurrentheavyrays
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abstract

Large-scale accretion shocks around massive clusters of galaxies, generically expected in the cold dark matter scenario of cosmological structure formation, are shown to be plausible sources of the observed ultrahigh energy cosmic rays (UHECRs) by accelerating a mixture of heavy nuclei including the iron group elements. Current observations can be explained if the source composition at injection for the heavier nuclei is somewhat enhanced from simple expectations for the accreting gas. The proposed picture should be clearly testable by current and upcoming facilities in the near future through characteristic features in the UHECR spectrum, composition and anisotropy, in particular the rapid increase of the average mass composition with energy from $10^{19}$ to $10^{20}$ eV.

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Forward citations

Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Cosmic ray heating of cold streams: Implications for the gas supply and growth of massive galaxies

    astro-ph.GA 2026-07 conditional novelty 7.0 of 10

    Externally entrained cosmic-web CRs weakly heat dense cold-stream cores but can strongly heat diffuse and mixed interface gas in massive haloes, adding selectivity to cold accretion.

  2. Ultra High Energy Cosmic Rays

    astro-ph.HE 2025-05 unverdicted

    A comprehensive review concluding that UHECRs are likely heavy nuclei and that accretion shocks and jets are the most promising sources, with no new experimental results.

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