Solving problems in Stellar Population Synthesis

Data: 
26/07/2017 - 14:00 - 15:00
Local: 
IAG, Aud. Principal - Bloco G

Solving problems in Stellar Population Synthesis

Gustavo Bruzual
Instituto de Radioastronomía y Astrofísica (IRyA), UNAM, Morelia, México


Abstract:
After a short introduction to the subject of stellar population synthesis I will present new population synthesis models that improve on the following aspects with respect to most available models. (a) Treatment of the UV spectral range, including new evolutionary tracks and updated treatment of the ionizing radiation emitted by the stellar population. (b) Improved treatment of TP-AGB stars that dominate the NIR spectral range. The number of these stars present in a stellar population has been calibrated carefully by comparison with observations of the LMC/SMC, and the spectra assigned to these stars include both the stellar emission and the emission from circumstellar dust (c) Definition of new diagnostics to characterize the combined stellar and nebular emission and the cold ISM in galaxies. (d) The expected effects of interacting binary stars. These models are available in a wide range of metallicity, from Z = 0 to Z = 0.06  and are ready to  use to interpret the spectra of galaxies of any age at low and high redshift.