16 Cygni A: A Testbed for Stellar Core Physics

We present a novel method aimed at reducing the number of stellar models accepted by the Forward Modelling down to the ones that better represent the core of a specific star. The method is illustrated on the bright, solar-like pulsator 16 Cygni A. We show that by comparing the observed frequency ratios for this benchmark star to the ones derived from stellar models, we are able to constrain further the fraction of hydrogen in the core, establishing its precise evolutionary state.