Fig. 3.

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IGM transmission TIGM for a Lyα emitting source at z = 6 for a given Lyα velocity offset ΔvLyα (coloured according to the scale shown on the top) as a function of the size of the ionised bubble, Rion. Results are shown both for a residual neutral fraction within the bubble scaling as xH I ∝ r2 (solid lines) and where it is constant with radius (dashed lines). Transmission curves in the top panel assume a global neutral hydrogen fraction of appropriate for the later stages of reionisation, whereas the bottom panel shows the transmission in a patchy reionisation scenario, where photons encounter gas that is still fully neutral upon exiting the ionised bubble (
).
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