Fig. 3.
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Velocity shift of the Lyα emission line in the G140M NIRSpec spectrum with a resolution of R ∼ 1000 compared to the systemic redshift (Δv = 0 km s−1) traced by the [O III] and Hβ lines. The emission line appears to be symmetric, centered very close to the systemic redshift with an offset of 113.3 ± 80.0 km s−1, with flux blueward of the peak. The observed line profile is indicative of significant Lyα photon escape thanks to virtually no neutral gas along the line-of-sight in the galaxy.
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