Nearby Young Stars and Young Moving Groups

The past two decades have seen dramatic progress in our knowledge of the population of stars of age \(\lesssim \) 150 Myr that lie within ∼100 pc of the Sun. Most such stars are found in loose kinematic groups (“nearby young moving groups,” NYMGs). The proximity of NYMGs and their members facilitates studies of the X-ray properties of coeval groups of pre-main-sequence (pre-MS) stars as well as of individual pre-MS systems. In this review, we focus on how NYMG X-ray studies provide unique insight into the early evolution of stellar magnetic activity, the X-ray signatures of accretion, and the irradiation and dissipation of protoplanetary disks by high-energy photons originating with their host pre-MS stars. We discuss the likely impacts of the next generation of X-ray observing facilities on these aspects of the study of NYMGs and their members.