Mg ii in the JWST era: a probe of Lyman continuum escape?
Limited constraints on the evolution of the Lyman Continuum (LyC) escape
fraction represent one of the primary uncertainties in the theoretical
determination of the reionization history. Due to the intervening intergalactic
medium (IGM), the possibility of observing LyC photons directly in the epoch of
reionization is highly unlikely. For this reason, multiple indirect probes of
LyC escape have been identified, some of which are used to identify
low-redshift LyC leakers (e.g. O32), while others are primarily useful at