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The past two decades have seen dramatic progress in our knowledge of thepopulation of young stars of age <200 Myr that lie within 150 pc of the Sun.These nearby, young stars, most of which are found in loose, comoving groups,provide the opportunity to explore (among many other things) the dissolution ofstellar clusters and their diffusion into the field star population. In the ageof Gaia, this potential can now be fully exploited. We have identified, and arenow investigating, a sample of nearly 400 Galex UV-selected late-type (K andearly-M) field stars with Gaia-based distances <120 pc and isochronal ages <=80Myr (even if binaries). Only a small percentage (<10%) of stars among this(kinematically unbiased) sample can be confidently associated with establishednearby, young moving groups (NYMGs). The majority display anomalous kinematics,relative to the known NYMGs. These stars may hence represent a previouslyunrecognized population of young stars that has recently mixed into the olderfield star population. We discuss the implications and caveats of such ahypothesis---including the intriguing fact that, in addition to theirnon-young-star-like kinematics, the majority of the UV-selected, isochronallyyoung field stars within 50 pc appear surprisingly X-ray faint.

The Dissolution of Clusters: What Can We Learn from Nearby, UV-bright, Overluminous Field Stars?