Free Access

Fig. 3


DARMOUTH isochrones for [Fe/H] = −3.5 and different ages from 16 to 10 Gyr (red dashed lines), blue dashed lines are HB and AGB theoretical tracks for [Fe/H] = −2.5 for two different relative masses (M = 0.6 and M = 1.0). The black diamonds represent the stars of this work and its internal uncertainties derived computed by the FERRE code. The red crosses are the four low-gravity objects explained in Sect. 2. The blue diamonds are bibliography values from Yong et al. (2013), Caffau et al. (2013), Placco et al. (2015) and discussed in Sect. 5.

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.