Assigned ID: 113 ----- Submission 1 (Thu Jan 20 23:25:21 GMT 2005) ----- We propose to carry out detailed comparisons of cosmological hydrodynamic simulations of galaxy formation versus HST/ACS and Spitzer/IRAC observations of z~4 "B-dropout" galaxies in the Great Observatories Origins Deep Survey. The goals are to (1) Test whether current simulations of galaxy formation produce results compatible with high-redshift galaxy observations; (2) Constrain model parameters, particularly those associated with dust extinction and galactic feedback; and (3) Provide detailed interpretations of observed broad-band colors in terms of galaxy physical properties such as stellar mass and extinction within a self-consistent cosmological scenario. We will carry out the comparisons by "observing" simulated galaxies through the appropriate broad band filters, computing each galaxy's magnitudes from its star formation history using population synthesis models. From this, we will gain insights into the physical processes that govern galaxy formation at these epochs, and provide a baseline concordant model that can be used to compare simulations to a wider range of observations such as galaxy clustering, redshift evolution, extragalactic background light, and galaxy properties observed at non-optical/NIR wavelengths.

GALAXIES 12 50562 salary; travel, publications, computing false 0.0 false false false true false SUPPORTED