g-mode asteroseismology meets open clusters

Open clusters, as stellar ensembles, allow us to probe stars of common age and composition across a range of masses. With the Gaia and TESS missions, we are now in a position to combine asteroseismology and open cluster studies to advance both fields. Gaia provides accurate open cluster memberships, including stars at large distances from the cluster centre, while TESS delivers nearly full-sky time-series photometry for these stars. TESS’s mission duration, spanning now over five years, renders all observed open clusters viable targets for g-mode asteroseismology. The long time baseline allows us to observe and identify period spacing patterns in g-mode pulsators, enabling thorough asteroseismic exploration and modelling. Due to their properties as homogenous stellar populations, open clusters serve as independent calibrators for asteroseismology, in particular for age dating, but also to probe internal mixing and angular momentum transport across stellar evolution. The unique combination of coeval stars of different masses in open clusters allows to combine previously independent methods with g-mode asteroseismology. We illustrate the synergies between open cluster studies and asteroseismology, focusing on various case studies of open clusters observed with TESS. Furthermore, we highlight how our advanced understanding of open clusters from Gaia can help asteroseismic explorations.