Fig. 8.
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Diffusion length as a function of CRE lifetime. Data points as in Fig. 4. Cosmic-ray transport models are shown for comparison. The green solid line shows energy-independent diffusion (μ = 0), the dashed red line shows streaming, and the purple dashed line shows the energy-dependent diffusion (μ = 1/3). The diffusion coefficient is parametrised as D ∝ Eμ.
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