Rotational ages for 300'000 stars from Kepler, Gaia, ASAS-SN, and NGTS

The exploration of stellar rotational evolution has seen major advancements in recent years. Following this progress, several projects, e.g., the PERICLES isochrones, gyro-interp, or ChronoFlow, have been initiated that aim to leverage gyrochronology, the method of using a late-type main sequence star’s observed rotation rate to estimate its age, an otherwise exceedingly difficult quantity to obtain. We used the PERICLES isochrones to calculate rotational ages for altogether about 300k stars in large-scale samples of stellar rotation (e.g., from Kepler, Gaia, ASAS-SN, and NGTS), most of them isolated field stars. The stars from our sample belonging to open clusters or wide binaries demonstrate the robustness of the derived ages.