Proper motions of cool and ultracool candidate members in the Upper Scorpius OB association
Aims: Proper motion measurements of the cool and ultracool populations in the Upper Scorpius OB association are crucial to confirm membership and to identify possible run-away objects. Methods: We cross-match samples of photometrically selected and spectroscopically confirmed cool and ultracool (K5 SpT M8.5) candidate members in the Upper
Bouy, H. et al.
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2009