Fig. 8.

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Predicted sized of an ionized bubble that JADES-GS-z7-LA (solid lines) and its companion source (dashed lines) as a function of time since star formation began for different LyC fesc. We use very simplistic assumptions here, where the ionizing photon production rates are considered to be constant over the entire lifetime of the sources, set to the currently inferred value from the UV magnitude. We find that neither JADES-GS-z7-LA nor the companion are capable of inflating an ionized bubble of size > 1.5 pMpc (shaded region), even if they had fesc(LyC) = 1.0 over the past 100 Myr of their lifetime. The visibility of Lyα from JADES-GS-z7-LA, therefore, suggests that these galaxies may be part of an ionized bubble inflated by other galaxies in the field, or be situated in an opportunistic sightline cleared of neutral hydrogen by intervening sources.
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