Seismic study of the Alpha Centauri binary system using the minimisation algorithm of Levenberg-Marquarth

Thanks to the CoRoT mission, we are going to get seismic data of very high precision for many stars. Throughout the method of asteroseismology these data will allow us to constrain the physical description of stellar interiors with unprecedented precision. In this context, we have developed a general tool which allows us to find stellar models fitting a set of seismic constraints (the oscillations frequencies) and non-seismic constraints (e.g. the luminosity, the effective temperature, ...). This tool follows the algorithm of Levenberg-Marquarth which seeks the fundamental parameters of the stellar model (e.g. the mass, the age, the helium abundance, the mixing-length parameter,ldots). We apply it to a specific case: the alpha Cen binary system. Taking into account all observational constraints available for this binary system, we succeed to find models entering between the one or two sigma error box of the observational constraints.