Spectral Energy Distributions of Stellar Populations for a Broad Range of Galaxy Properties

Abstract

We present an upgrade to Starburst99 in which we include the capacity to utilize new evolutionary tracks both rotating and non-rotating at a range of low- and high-metallicity environments. We complement these tracks with corresponding model atmospheres, increasing the resolution of the synthetic spectra. Additionally we include both evolutionary and atmospheric models of stars with masses up to 300−500 M _e . We make new predictions for a range of properties of synthetic stellar populations, such as ionizing flux, spectral energy distribution, bolometric luminosity, wind momentum and the ultraviolet β -slope. These properties are all assessed over wider coverage in metallicity, mass and resolution than in previous versions of Starburst99.