Fig. 6
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Proper motions of stars in Grus II and Tucana IV from Gaia DR3. The stars are color-coded according to the membership probability based on Battaglia et al. (2022), updated to include the vrad measured here. The red cross shows the systemic proper motion (Battaglia et al. 2022); the red ellipse corresponds to 1σ, which is the error on the mean proper motions.
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