Lyα visibility from z = 4.5 to 11 in the UDS field: Evidence for a high neutral hydrogen fraction and small ionized bubbles at z ∼ 7

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Table 1.

Observed fraction of Lyα-emitting galaxies with EW₀ > 25 Å as a function of redshift.

	X_Lyα (EW₀ > 25 Å)
Redshift	UDS (This work)	Average JWST fields
5	13.9 $_{- 2.7}^{+ 4.0}$ $Mathematical equation: $ _{-2.7}^{+4.0} $$	15.3 ± 2.1
6	21 $_{- 5}^{+ 8}$ $Mathematical equation: $ _{-5}^{+8} $$	21.8 ± 3.5
7	5.0 $_{- 1.9}^{+ 6}$ $Mathematical equation: $ _{-1.9}^{+6} $$	14.8 ± 2.7
8	17 $_{- 7}^{+ 18}$ $Mathematical equation: $ _{-7}^{+18} $$	21 ± 9
9	17 $_{- 14}^{+ 29}$ $Mathematical equation: $ _{-14}^{+29} $$	10 ± 6

Notes. Results from the UDS field are not corrected for Lyα slit losses. For comparison, we report the average estimates from all available JWST fields obtained when considering also literature results (Nakane et al. 2024; Napolitano et al. 2024; Tang et al. 2024b; Jones et al. 2025; Kageura et al. 2025).

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