Stellar Evolution Tracks, Isochrones, and Isochrone-Clouds

The modelling of stellar interiors is performed by critically comparing observations to carefully constructed theoretical stellar models. These theoretical stellar models are predicated on a number of assumptions and simplifications that have implications for the results of the modelling. In this chapter, we discuss the details of the stellar evolutionary models used throughout this monograph, as well as the implementations of several physical mechanisms within the models. Furthermore, we discuss the problem of correlations between parameters of a model, and introduce a statistical framework to carry out the modelling of stellar interiors in the presence of underlying model parameter degeneracies. Finally, we discuss several numerical methods for the determination of uncertainties.