JADES Lyman alpha ancillary data table

For reionization era galaxies, a neutral intergalactic medium (IGM) will scatter Lya from the line of sight, making Lya a useful probe of the neutral fraction evolution. Here, we explore Ly{alpha} in JWST/NIRSpec spectra from the ongoing JADES programme, which targets hundreds of galaxies in the well-studied GOODS-S and GOODS-N fields.

These sources are UV-faint (-20.4<M_UV_<-16.4), and thus represent a poorly-explored class of galaxies. The low spectral resolution (R~100) spectra of a subset of 84 galaxies in GOODS-S with z_spec_>5.6 (as derived with optical lines) are fit with line and continuum models, in order to search for significant line emission. Through exploration of the R100 data, we find evidence for Ly{alpha} in 17 sources.