Time-resolved surveys of stellar clusters

Abstract

We describe the information that can be gained when a survey is done multi-epoch, and its particular impact for open clusters. We first explain the irreplaceable information that multi-epoch observations are giving within astrometry, photometry and spectroscopy. Then we give three examples for results on open clusters from multi-epoch surveys, namely, the distance to the Pleiades, the angular momentum evolution of low mass stars and asteroseismology. Finally we mention several very large surveys, which are ongoing or planned for the future, Gaia, JASMINE, LSST, and VVV.Comment: 8 pages, 1 figure, JENAM 2010: Star Clusters in the Era of Large Surveys, Editors: A.Moitinho and J. Alves; Second initial added for R. I. Anderson, reference adde