Calibrating core overshooting parameters with two-dimensional hydrodynamical simulations

The extent of mixed regions around convective zones is one the biggest uncertainties in stellar evolution. 1D overshooting descriptions introduce a free parameter ($f_{ov}$) that general not well constrained from observations. Especially small central value highly uncertain due to its tight connection pressure scale height. Long-term multi-dimensional hydrodynamic simulations can be used study size region and involved mixing processes. Here we show how calibrate an by performing 2D Maestro Zero-Age-Main-Sequence stars ranging $1.3$ $3.5 M_\odot$. cover cores large fraction surrounding radiative envelope. We follow flow for at least 20 turnover times, while longest simulation covers 430 time scales. This allows us as boundary evolve with time, resulting entrainment interpreted terms parameters. find increasing $f_{ov}$ beyond certain initial model our simulations, changes behaviour completely. result put limits on parameter. $0.010 < f_{ov} 0.017$ good agreement M_\odot$ mass star. also identify diffusive component internal gravity waves (IGW) active throughout convectively stable layer, but likely overestimated simulations. Furthermore, applying calibration method less massive suggests need mass-dependent description where height reduced cores.