Poster abstract details

In this work we combine and analyse the radial velocity time series of the solar-like star alpha Cen A obtained in 2001 in Chile and Australia with three spectrographs: CORALIE, UVES and UCLES. The resulting time series is as long as the CORALIE one (12.45 days) but contains almost 5 times more data points and its spectral window presents daily aliases reduced by a factor 2.6. A new set of frequencies has been detected along with some rotational splittings.
A comparison with stellar models indicates that the seismic constraints determined in this study (namely the small separations d-10 and delta nu-13) allow us to put an upper limit to the amount of convective-core overshooting needed to model stars of mass and metallicity similar to those of alpha Cen A.