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Anisotropies of ultrahigh-energy cosmic rays in a scenario with nearby sources

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arxiv 2111.00560 v2 pith:4IM2YXDY submitted 2021-10-31 astro-ph.HE

classification astro-ph.HE
keywords sourcescosmicextragalacticmagneticaboveaugercontributiondeflections
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The images of ultrahigh-energy cosmic ray sources get distorted, in an energy dependent way, by the effects of Galactic and extragalactic magnetic fields. These deflections can also affect the observed cosmic ray spectrum, specially when the sources are transient. We study scenarios in which one or a few nearby extragalactic sources, such as CenA or M81/M82, provide the dominant contribution to the cosmic ray flux above the ankle of the spectrum. We discuss the effects of the angular dispersion induced by the turbulent extragalactic magnetic fields, and the coherent deflections caused by the regular Galactic magnetic field, with the associated multiple imaging of the sources. We consider the possible contribution from those sources to the dipolar distribution discovered by the Pierre Auger Observatory above 8 EeV, as well as to the hot spots hinted in the observations by the Pierre Auger and Telescope Array observatories at higher energies, taking into account the mixed nature of the cosmic ray composition.

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Cited by 1 Pith paper

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

  1. Revisiting Propagation Delays of Ultra-High-Energy Cosmic Rays from Long-lived Sources

    astro-ph.HE 2025-02 conditional novelty 4.0 of 10

    Propagation delays of ultra-high-energy cosmic rays in extragalactic magnetic fields can match or exceed AGN duty cycles, weakening the link between detected cosmic rays and their long-lived sources.

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