Multiphase ISM simulations show PeV cosmic-ray diffusion coefficients reach 10^30 cm^2 s^-1, with perpendicular transport boosted at thermal phase boundaries while overall transport is controlled by trans-Alfvenic warm and unstable gas.
Effective cosmic ray diffusion in multiphase galactic environments.arXiv e-prints2025, p
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Diffusion of PeV Cosmic Rays in the Turbulent and Multiphase Interstellar Medium
Multiphase ISM simulations show PeV cosmic-ray diffusion coefficients reach 10^30 cm^2 s^-1, with perpendicular transport boosted at thermal phase boundaries while overall transport is controlled by trans-Alfvenic warm and unstable gas.