Horizon-AGN virtual observatory - 1. SED-fitting performance and forecasts for future imaging surveys

Understand

Using the ligthcone from the cosmological hydrodynamical simulation Horizon-AGN, we produced a photometric catalogue over $0<z<4$ with apparent magnitudes in COSMOS, DES, LSST-like, and Euclid-like filters at depths comparable to these surveys.

• The virtual photometry accounts for the complex star formation history and metal enrichment of Horizon-AGN galaxies, and consistently includes magnitude errors, dust attenuation and absorption by inter-galactic medium.
• The COSMOS-like photometry is fitted in the same configuration as the COSMOS2015 catalogue.
• We then quantify random and systematic errors of photometric redshifts, stellar masses, and star-formation rates (SFR).