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A Heavy-metal Scenario of Ultra-high-energy Cosmic Rays

  • Authors: Jakub Vícha, Alena Bakalová, Ana L. Müller, Olena Tkachenko, Maximilian K. Stadelmaier

Jakub Vícha et al 2025 The Astrophysical Journal Letters 986 .

  • Provider: AAS Journals

Caption: Figure 5.

Top panel: possible directions of an extragalactic dipole in the arrival directions of cosmic rays above 8 EeV, compatible at the 1σ (blue area) and 2σ (blue contour) levels with the Auger measurement (A. Aab et al. 2017b), for the UF23 models of the GMF, shown in Galactic coordinates. The mass composition scenario obtained for SIBYLL 2.3d + ΔXmax is used. Middle panel: the distribution of backtracked directions at the edge of the Galaxy for the 100 most energetic Auger events (A. Abdul Halim et al. 2023a), shown in Galactic coordinates. Bottom panel: distribution of the backtracked directions at the edge of the Galaxy for isotropically distributed arrival directions of iron nuclei on Earth, shown in Galactic coordinates and accounting for the Auger geometrical exposure.

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