Kalina Nedkova (Caltech/IPAC)

Space-based near-infrared slitless spectroscopy is a transformative tool for tracing galaxy evolution at intermediate to high redshifts, capturing key emission-line diagnostics with minimal observational biases. The JWST/NIRISS pure-parallel wide-field slitless spectroscopy program PASSAGE is an unbiased spectroscopic survey spanning 63 independent fields. Direct imaging and spectra are obtained for every object in the field of view without pre-selection, mitigating cosmic variance and enabling a representative census of distant galaxies. PASSAGE enables new insight into the interplay between star formation, feedback, and chemical enrichment across cosmic time. The survey provides gas-phase metallicity measurements for large galaxy samples spanning a broad range of stellar mass over 1.7 < z < 3.4. I will present measurements of how metallicity evolves as a function of stellar mass and discuss how these trends reveal evidence of different modes of star formation and feedback. I will also highlight how PASSAGE demonstrates the power of wide-field slitless spectroscopy to characterize galaxy populations and establish empirical benchmarks for galaxy evolution models. These results provide a foundation for upcoming wide-area spectroscopic surveys with missions such as Roman, which will yield vastly larger samples and enable studies of star formation, feedback, and chemical enrichment across diverse environments.