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Accueil > Séminaires > Archive des séminaires d’Utinam > 2012

Maria Czekaj

The new version of the Besançon Galaxy Model : one step closer to Gaia

par Edith Burgey -

Le jeudi 29 mars 2012 à 10h30, salle de conférences de l’Observatoire

Par Maria Czekaj

Résumé  :

The construction of a dynamical model of the Milky Way from the upcoming Gaia data will require a complex comparison between models and data in the space of the observables. To be ready for this challenge, in my PhD thesis, we have optimized the Besançon stellar population synthesis model. In this new version, almost ready, ingredients as critical as the IMF, the SFR, the binary fraction, the age-metallicity relation and the age-kinematic relation can be fitted to the observed data. That is this new version is not any more a single stars generator, but it considers binary systems maintaining constraints on the local mass density. The optimization includes also the use of most updated evolutionary tracks and model atmospheres. Various scenarios for those parameters have been checked against the Tycho-2 data.