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Binary neutron star mergers as the source of the highest energy cosmic rays

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arxiv 2405.12004 v2 pith:KZ4PKCNR submitted 2024-05-20 astro-ph.HE hep-ph

Glennys R. Farrar This is my paper · ORCID
classification astro-ph.HEhep-ph
keywords mergersbinarycosmicenergynarrowneutronrangerays
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abstract

We propose that ultrahigh energy cosmic rays are produced in binary neutron star mergers. This scenario can account for the heretofore inexplicable narrow rigidity range of UHECRs, because the jets of BNS mergers are generated by a gravitationally-driven dynamo and thus are nearly identical due to the narrow range of BNS masses. Observed UHECRs with energies well beyond 100 EeV can be explained as $r$-process nuclei, without invoking an exotic source class. Evidence for this mechanism, and its prediction of coincidences between neutrinos above 10 PeV and gravitational waves, are discussed.

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Cited by 3 Pith papers

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

  1. Proton-air interaction properties at $\sqrt{s} \simeq 100$ TeV from shower-depth measurements with the Pierre Auger Observatory and their connection to the Muon Puzzle

    hep-ex 2026-07 conditional novelty 6.0 of 10

    Using a universal relation found across hadronic interaction models, Auger's deeper-than-predicted shower maxima imply increased elasticity and hadronic energy fraction in proton–air collisions, needing 2.8–4.6× ampli...

  2. Ultra-High-Energy Particle Production in Binary Mergers Endowed with Magnetic Fields

    astro-ph.HE 2026-07 conditional novelty 5.0 of 10

    Using a magnetized Kerr spacetime, the authors compute that binary merger remnants can yield proton collision energies up to 10^20 eV, proposing them as UHECR sources.

  3. The Global Cosmic Ray Observatory -- Challenging next-generation multi-messenger astronomy with interdisciplinary research

    astro-ph.HE 2025-07 unverdicted novelty 2.0 of 10

    GCOS is proposed as a 60,000 km2 cosmic-ray observatory that would boost exposure tenfold and enable charged-particle astronomy, though this paper only restates the design goals.

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