  Indirect diagnostics of Lyman continuum (LyC) escape are needed to constrain
which sources reionized the universe. We used Mg II to predict the LyC escape
fraction (fesc(LyC)) in 14 galaxies selected from the Hobby-Eberly Telescope
Dark Energy Experiment solely based upon their Mg II properties. Using the Low
Resolution Spectrograph on HET, we identified 7 and 5 possible LyC leakers
depending on the method, with fesc(LyC) ranging from 3 to 80%. Interestingly,
our targets display diverse [O III]/[O II] ratios (O32), with strong inferred
LyC candidates showing lower O32 values than previous confirmed LyC leaker
samples. Additionally, a correlation between dust and fesc(LyC) was identified.
Upcoming Hubble Space Telescope/Cosmic Origins Spectrograph LyC observations of
our sample will test if Mg II and dust are predictors of fesc(LyC), providing
insights for future JWST studies of high-redshift galaxies.
