Stellar Properties from a self-consistent Analysis

Abstract

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