Galactic magnetic field time delays for transient UHECR sources induce a spectral cutoff, composition shift to heavier nuclei, and developing dipole anisotropy over ~100 kyr timescales.
Farrar, and Michael Unger
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Numerical modeling of time-dependent cosmic-ray advection and diffusion in spherically symmetric wind bubbles shows escaping spectra harder than E^{-2} during the wind-driven phase, with low-energy suppression depending on the turbulence model.
citing papers explorer
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Temporal Invariance Is an Illusion: Time-Dependent Influences of the Galactic Magnetic Field on UHECR Observations
Galactic magnetic field time delays for transient UHECR sources induce a spectral cutoff, composition shift to heavier nuclei, and developing dipole anisotropy over ~100 kyr timescales.
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Time-dependent cosmic-ray escape from wind bubbles: hard spectra formation
Numerical modeling of time-dependent cosmic-ray advection and diffusion in spherically symmetric wind bubbles shows escaping spectra harder than E^{-2} during the wind-driven phase, with low-energy suppression depending on the turbulence model.