Recovering the Ages of Stars of a Complex Stellar Population System: IAC-pop/MINNIAC and the LCID project.

Sebastián Hidalgo

Instituto de Astrofísica de Canarias

We present IAC-pop/MINNIAC, a code to recover the age and metallicity of stars of a complex stellar population system, like a galaxy. It uses a generic algorithm to minimize a chi^2 merit function comparing the star distributions in the observed color-magnitude diagram (CMD) and the CMD of a synthetic stellar population. A parametrization of the CMDs is used, which is the main input of the code. The computation of the synthetic CMD can be done using the code IAC-star. Since this is a quite time consuming step, a method is presented requiring computation of only a single synthetic CMD. IAC-pop/MINNIAC has been run through several consistency tests and has been proved with deep ACS/HST photometry from the LCID project. We present the first results for the star formation histories of six galaxies using IAC-pop/MINNIAC code.

Date: Vendredi, le 31 octobre 2008
Heure: 12:30
Lieu: Université Laval
  Pavillon Alexandre-Vachon, local 1661