UHECR deflections in the coherent Galactic magnetic field
High Energy Astrophysical Phenomena
2025-11-20 v2 Astrophysics of Galaxies
Abstract
We study the deflections of ultra-high-energy cosmic rays in several widely used models of the coherent Galactic magnetic field (GMF), including PT11 (Pshirkov et al. [1]), JF12 (Jansson and Farrar [2]), UF23 (Unger and Farrar [3]) and KST24 (Korochkin, Semikoz, and Tinyakov [4]). 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.
Keywords
Cite
@article{arxiv.2501.16158,
title = {UHECR deflections in the coherent Galactic magnetic field},
author = {Alexander Korochkin and Dmitri Semikoz and Peter Tinyakov},
journal= {arXiv preprint arXiv:2501.16158},
year = {2025}
}
Comments
v2: 8 pages, 5 figures, accepted to PRD; added a brief discussion of the turbulent GMF