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Fig. 1


RV distribution for all the stars with EW(Li) > 100 mÅ. The three lines describe the best-fit models obtained using: (a) one stellar population with a Gaussian distribution (green dotted line); (b) one population with a Gaussian distribution and a second one with the same distribution of Gamma Velorum B (blue dashed line); and (c) two populations with Gaussian distributions (red continuous line). Stars with >80 per cent probability of belonging to population B according to model (b) are highlighted with blue shading. The vertical dotted black lines indicate the central velocity of Gamma Vel A (left) and Gamma Vel B (right) found by Jeffries et al. (2014).

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