http://arxiv.org/abs/1810.09754
Using the FirstLight database of 300 zoom-in cosmological simulations we provide rest- frame UV-optical spectral energy distributions of galaxies with complex star-formation histories that are coupled to the non-uniform gas accretion history of galactic halos during cosmic dawn. The population at any redshift is very diverse ranging from starbursts to quiescent galaxies even at a fixed stellar mass. This drives a redshift- dependent relation between UV luminosity and stellar mass with a large scatter, driven by the specific star formation rate. The UV slope and the production efficiency of Ly- man continuum photons have high values, consistent with dust-corrected observations. This indicates young stellar populations with low metallicities. The FirstLight simula- tions make predictions on the rest-frame UV-optical absolute magnitudes, colors and optical emission lines of galaxies at z=6-12 that will be observed for the first time with JWST and the next generation of telescopes in the coming decade.
D. Ceverino, R. Klessen and S. Glover
Wed, 24 Oct 18
26/75
Comments: 10 pages+appendix , 11 figures. Submitted to MNRAS. The FirstLight database is available at this http URL