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Fig. 8.

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Summary of the velocity and metallicity measurements of the spectroscopic sample to investigate potential velocity and/or metallicity gradients. The velocity uncertainties are reported in the plot but are so small compared to the scale of the y axis that they are overall not visible, except for a few cases with extremely large uncertainties. Top panel: velocity vs. position along Boo II’s major axis. The colour and marker schemes are similar to what was shown in the previous plots. The literature (i.e. K09 + B23) and new members do not display any sign of a velocity gradient, even by including the potential more metal-rich member candidate at χ ∼ −10 arcmin. Lower panel: CaT (with black contours) and CaHK (without contours) metallicities. In the case where both are available for the same star, the two values are linked by a dashed grey line.

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