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Fig. 1


Velocity distribution for all stars in the sample of Holmberg et al. (2009; plus signs), stars of Group 1 (circles), and the stars investigated here (filled circles).

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.

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