Intergalactic Lyman- haloes before reionization are detectable with JWST

The James \ Webb \ Space \ Telescope \ (JWST) recently reported a large population of UV luminous galaxies at high redshifts, z > 10, as well as Lyman- emitting (LAE) galaxies out to z 11. We use the observed UV luminosities along with a data-driven approach at lower redshifts to place constraints on the observability of the intergalactic Lyman- intensity, scattered in the form of Loeb-Rybicki haloes, during the pre-reionization and reionization epochs (z 9-16). We forecast the sensitivity and resolution required to detect these intergalactic haloes, finding that individual haloes with LAE luminosities > 10^43 ergs/s are detectable at a few sigma level at z 11, while stacking of 10 haloes is expected to result in detections out to z 16. Finding these haloes is expected to shed light on the neutral intergalactic hydrogen during cosmic reionization.