Atomic diffusion in solar-like stars with MESA

The stellar evolution code Modules for Experiments in Stellar Astrophysics (MESA) is public and widely used by the community. It includes possibility of taking several non-standard processes such as atomic diffusion into account. Even if effect gravitational settling considered a standard ingredient modelling today, this not case radiative accelerations. specific treatment along with accelerations has never been compared other codes. Benchmarking these codes important because improved accuracy required order to analyse data from present future space missions, \textit{Kepler}, Transiting Exoplanet Survey Satellite (TESS), PLAnetary Transits Oscillations stars (PLATO) missions. aim paper compare MESA models including (with accelerations) computed Montreal/Montpellier Code d'Evolution Stellaire Adaptatif et Modulaire (CESTAM). Additionally, we assess impact some options related diffusion. We calculated diffusion, accelerations, following abundance profiles 14 elements models. This was then 1.1 1.4~$M_{\odot}$ CESTAM Various tests were also carried out varying only one them at time. find that rather well two when are carefully set. show crucial proper