Speaker
Description
Nebular emission lines are a powerful diagnostic tool for tracing the chemical evolution in star-forming galaxies (SFGs) across cosmic time. The COS Legacy Spectroscopy SurveY (CLASSY) is a treasury survey that comprises UV+optical spectra of 45 local SFGs covering a broad range of physical properties in terms of gas-phase metallicity, ionization parameter, star-formation rate, and stellar mass. In this study, we present an analysis of the abundance patterns of N/O, Ne/O, Cl/O, S/O, and Ar/O vs. O/H and their relationship with different galaxy properties (e.g., stellar mass and star-formation rate). We found that such abundance ratios show a constant trend with O/H as expected, except for Ne/O and Ar/O at high metallicities. We discuss the scatter involved in the N/O versus O/H relation and its connection with the different UV+optical observables. Finally, we compare the abundance patterns of CLASSY with the results of z > 6 galaxies observed with the JWST.
