Free Access

Fig. 1


A Hipparcos HR-diagram for our entire sample. The three solid curves are Y2 isomass tracks set at a solar mass and with three different metallicities of  − 0.3, 0.0 and +0.3 dex running from left to right. These tracks highlight the changing position of the main sequence as a function of metallicity and we highlight this by dashed lines on either side of the thick solid Hipparcos main sequence. The dotted line is our cut to separate true subgiant stars from super metal-rich main sequence stars.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.