Detecting the Sun in 2-Gyr old open clusters
收藏ESA Earth Online2026-06-22 收录
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Observations of old open clusters have been performedwith ROSAT but with limited sensitivity and spatial resolutionand allowed to investigate the evolution only of very active binaries. Currently the coronal activityage relation beyond 1Gyr is not known. We propose a 50 ks XMMNewton pointingsto the 2Gyr old clusters NGC 752 and IC 4651, which are well studied in the optical. We will study the coronal activity evolution in solar type stars, in post mainsequence and binary stars
