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One-dimensional stellar evolution models have been successful at representingthe structure and evolution of stars in diverse astrophysical contexts, butcomplications have been noted in the context of young, magnetically activestars, as well as close binary stars with significant tidal interactions.Numerous puzzles are associated with pre-main sequence and active main-sequencestars, relating to their radii, their colors, certain elemental abundances, andthe coevality of young clusters, among others. A promising explanation forthese puzzles is the distorting effects of magnetic activity and starspots onthe structure of active stars. To assist the community in evaluating thishypothesis, we present the Stellar Parameters Of Tracks with Starspots (SPOTS)models, a grid of solar-metallicity stellar evolutionary tracks and isochroneswhich include a treatment of the structural effects of starspots. The modelsrange from 0.1-1.3\msun and from spot-less to a surface covering fraction of85\%, and are evolved from the pre-main sequence to the red giant branch (or15~Gyr). We also produce two-temperature synthetic colors for our models usingempirically-calibrated color tables. We describe the physical ingredientsincluded in the SPOTS models and compare their predictions to other modernevolution codes. Finally, we apply these models to several open questions inthe field of active stars, including the radii of young eclipsing binaries, thecolor scale of pre-main sequence stars, and the existence of sub-subgiants,demonstrating that our models can explain many peculiar features of activestars.

The SPOTS Models: A Grid of Theoretical Stellar Evolution Tracks and Isochrones For Testing The Effects of Starspots on Structure and Colors