Stellar Properties from a self-consistent Analysis

Abstract

Galaxies’ spectral energy distribution (SED) has been explored through the use of spectralsynthesis codes. Most of the codes so far are solely stellar and assume a negligible nebularcontribution. Fitting Analysis using Differential Evolution Optimisation (FADO) is the firstspectral synthesis tool to consider the nebular contribution. The study examines how the primarystellar attributes are affected when FADO is applied to the Max Planck Institute for Astrophysicsand Johns Hopkins University (MPA-JHU) data, namely the star-formation rate, metallicity, andstellar mass. The findings show that nebular emission results in the change of the slope of theequation of "the main sequence by 0.04 dex ", and " the vertical intercept by 0.3 dex ", andunderestimates gas-phase metallicity of star-forming galaxies by 0.013.