Ultrahigh-energy cosmic ray deflections in the coherent Galactic magnetic field
Phys. Rev. D 112, 103046 – Published 24 November, 2025
DOI: https://doi.org/10.1103/ftbd-fwgm
Abstract
We study the deflections of ultrahigh-energy cosmic rays in several widely used models of the coherent Galactic magnetic field (GMF), including PT11 [Pshirkov et al., Astrophys. J. 738, 192 (2011)], JF12 [Jansson and Farrar, Astrophys. J. 757, 14 (2012)], UF23 [Unger and Farrar, Astrophys. J. 970, 95 (2024)] and KST24 [Korochkin, Semikoz, and Tinyakov, Astron. Astrophys. 693, A284 (2025)]. We propagate particles with rigidities of 5, 10, and 20 EV and analyze the differences in deflection predictions across these GMF models. We identify the GMF components responsible for deflections in various regions of the sky and discuss the uncertainties in modeling these components, as well as potential future improvements.
