Lyman Continuum (LyC) leakers are typically compact, low-mass systems characterized by intense star formation, high ionization parameters, and ionizing UV radiation escaping through low-density regions of their interstellar medium (ISM). Accurate estimation of the LyC escape fraction ($f_{esc}$) is challenging due to dust extinction and intergalactic medium (IGM) absorption, especially at high redshifts where the IGM is more opaque.

 

This study presents the ionizing photon production and escape in star-forming galaxies at cosmic noon using multiwavelength imaging and spectroscopic data. The analysis focuses on UV continuum slopes ($\beta$) and rest-frame optical emission-line diagnostics, particularly Mg\,\textsc{ii} and [Ne\,\textsc{iii}], derived from DESI spectroscopy, to probe the physical conditions governing LyC leakage. The UV spectral slope is used as a tracer of dust attenuation, while Mg\,\textsc{ii} and [Ne\,\textsc{iii}] emission provide ionization state and ISM properties.

 

The findings contribute to refining selection criteria for LyC leakers and provide a framework for combining UV and spectroscopic diagnostics. This work expands the sample, incorporate emission-line diagnostics, and perform detailed SED modeling to better constrain dust attenuation and intrinsic ionizing output, improving our understanding of the role of star-forming galaxies in the cosmic ionization budget.