Fig. 1
Energy distributions of CR protons at different epochs characterised by the parameter n × T values (in unit cm−3s): 3 × 1014 (curve 1), 1015 (curve 2), 5 × 1015 (curve 3), 1016 (curve 4). The left panel is for the proton injection spectrum with an index of 2, and the right panel for the index 2.85 (in momentum). The normalisations are arbitrary.
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