Evolution of coronal activity from observations of open clusters and SFRs

GTOpen clusters and young stellar associations offer unique opportunities tostudy the evolution of angular momentum in latetype stars and the dependemce ofcoronal activity upon age, rotation and mass. We propose to carry out aspectroscopic survey of several nearby open clusters of different ages and of afew star forming regions (SFRs) with the aim of deriving the evolution ofcoronal properties for stars of different masses. The selected clusters (IC2602,alpha Persei, Hyades and Praesepe) span the age range from 30 Myr to 700 Myr,while the lelected star forming regions (NGC2024 in Orion and TaurusAuriga)will allow us to further extend this study to ages as young as 1 to 10 Myr.Other clusters and SFRs will be observed by other XMM GT and GO programmes. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]