Galactic astronomy with AO: Nearby star clusters and moving groups

摘要

Observations of Galactic star clusters and objects in nearby moving groupsrecorded with Adaptive Optics (AO) systems on Gemini South are discussed. Theseinclude observations of open and globular clusters with the GeMS system, andhigh Strehl L' observations of the moving group member Sirius obtained withNICI. The latter data fail to reveal a brown dwarf companion with a mass inexcess of 0.02 solar in an 18 x 18 arcsec^2 area around Sirius A. Potentialfuture directions for AO studies of nearby star clusters and groups withsystems on large telescopes are also presented.