Fig. 5
Energy density of Lyα (top) and Lyβ (bottom) emission in the precursor (left) and postshock (right) regions. The vertical dashed lines give the positions of the cuts shown in Fig. 6: (PRE) in the precursor at zpre = 1016 cm, (PEAK) at the peaks of Lyα and Lyβ emission at z ~ 1012 cm and ~ 2 × 1011 cm respectively, and (DEEP) deeper in the postshock at z ~ 1014 cm.
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