On TP-AGB stars and the mass of galaxies

Recent calculations of evolutionary tracks of TP-AGB stars of different mass and metallicity by Marigo et al. (2007) have been incorporated in the Bruzual & Charlot evolutionary population synthesis models. The mass of the stellar population in HUDF galaxies at z from 1 to 3 determined from fits to the spectro-photometric data of these galaxies are 5 to 15% of the mass determined from the BC03 models. The ages inferred for these populations are 20 to 50% of the BC03 estimates