Observed rotation rates for cluster members from surface modulations or g-mode pulsations as a function of colour index. The y-axis is the rotation frequency in d⁻¹. The bottom x-axis shows the observed Gaia colour index, while the top x-axis shows both the effective temperature and the intrinsic Gaia colour index from the best-fitting isochrone. The red squares show cluster members with near-core rotation rates measured from their identified g modes, while the dark blue crosses are stars with surface rotation measurements from modulations in their light curves. Rotation uncertainties are typically smaller than the marker sizes. The grey dots are the surface rotation rates for the late-type stars used for gyrochronology in the cluster reported by Fritzewski et al. (2020). The black dotted line represents the Keplerian critical rotation rate f_rot, cri from the best-fitting isochrone model.