Spectral Synthesis of stellar populations
The spectrum of a galaxy is the synthesis of the individual spectra of typically billions of stars and the nebular emission excited by their radiative output. It may additionally comprise further thermal and non-thermal emission components arising from an active galactic nucleus, heated dust and large-scale shocks in the multi-phase interstellar medium, all of which combining into a panchromatic spectral energy distribution (SED) that encodes the energy production mechanisms and assembly history of a galaxy. Deciphering from an observed galaxy SED of the mass, age and metallicity of individual stellar populations, is the objective of spectral synthesis - one of the most technically challenging yet fundamental tools of extragalactic research.
The purpose of this web-page is to provide a description of publicly available spectral synthesis tools for the exploration of the star formation- and chemical enrichment history of galaxies.
This is part of the main research goals of the Thematic Line "The assembly history of galaxies resolved in space and time" at Institute of Astrophysics and Space Sciences (IA). This page also provides a forum for interaction between observers and theoreticians toward the development of future numerical tools for modeling, analysis and interpretation of spectrophotometric observations of galaxies.
Jean Michel Gomes@2019