Free Access

Fig. 4.

image

Top panel: normalised metallicity distribution of the LP First stars sample (grey histogram), compared to the ultra-metal-poor sample studied by Sestito et al. (2019) (yellow histogram), the Nissen & Schuster (2010) sample (orange histogram) and the Gaia DR2-APOGEE sample (pink histogram). The four samples span about 7 dex in [Fe/H]. Middle panel: distribution in the XY plane of stars from the Gaia DR2-APOGEE (stellar number density map in logarithmic scale), the LP First stars (black dots), the Nissen & Schuster (2010) sample (orange dots), and the Sestito et al. (2019) sample (yellow dots). Units are in kpc. Bottom panel: distribution in the RZ plane of stars in the different samples. Colours and units are the same as those adopted in the middle panel.

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.