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Table 1.
Results for the seven UFDs analysed in this paper.
| Name | Initial guess | 〈μα cos δ〉 mas yr−1 | σμα mas yr−1 | 〈μδ〉 mas yr−1 | σμδ mas yr−1 | cov(μα cos δ, μδ) | Nmembers |
|---|---|---|---|---|---|---|---|
| Carina II | RV | 1.81 | 0.08 | 0.14 | 0.08 | 0.01 | 39 |
| Reticulum II | RV | 2.34 | 0.12 | −1.31 | 0.13 | 0.04 | 54 |
| Segue 2 | RV | 1.27 | 0.11 | −0.10 | 0.15 | 0.15 | 22 |
| Boötes III | HB | −1.21 | 0.13 | −0.92 | 0.17 | 0.23 | 34 |
| Grus II | HB | 0.22 | 0.12 | −1.41 | 0.11 | −0.02 | 32 |
| Sagittarius II | HB | −1.18 | 0.14 | −1.14 | 0.11 | 0.24 | 78 |
| Tucana IV | HB | 0.72 | 0.09 | −1.71 | 0.10 | 0.00 | 23 |
Notes. We note that an additional systematic error of 0.035 mas yr−1 should be added to the quoted uncertainties, as explained in Gaia Collaboration (2018b).
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