Table A.1.
Stellar parameters and chemical abundances for ED-2 stars.
| source_id | Teff | log g | vt | [Fe/H]I | [Fe/H]II | [Na/Fe] | [Mg/Fe] | [Al/Fe] | [Mn/Fe] | [Ba/Fe] | [Eu/Fe] |
|---|---|---|---|---|---|---|---|---|---|---|---|
| – | [K] | – | [km s−1] | – | – | – | – | – | – | – | |
| 4245522468554091904 | 6657 | 4.30 | 1.68 | -2.48 ± 0.05 | -2.46 ± 0.10 | -0.25 ± 0.10 | 0.18 ± 0.07 | -0.22 ± 0.07 | -0.45 ± 0.12 | -0.13 ± 0.15 | |
| 4479226310758314496 | 5974 | 4.53 | 1.12 | -2.70 ± 0.05 | -2.57 ± 0.06 | -0.23 ± 0.07 | 0.30 ± 0.08 | -0.34 ± 0.07 | -0.52 ± 0.09 | -0.35 ± 0.10 | |
| 6632335060231088896 | 5620 | 3.60 | 1.32 | -2.54 ± 0.05 | -2.44 ± 0.04 | -0.07 ± 0.08 | 0.33 ± 0.06 | -0.32 ± 0.07 | -0.41 ± 0.06 | -0.17 ± 0.08 | 0.61 ± 0.08 |
| 6746114585056265600 | 6110 | 4.55 | 1.28 | -2.57 ± 0.05 | -2.44 ± 0.02 | -0.25 ± 0.08 | 0.29 ± 0.06 | -0.27 ± 0.08 | -0.43 ± 0.06 | -0.24 ± 0.09 | |
| 4318465066420528000a | 5445 | 3.04 | 1.60 | -2.33 ± 0.05 | -2.35 ± 0.05 | -0.15 ± 0.09 | 0.38 ± 0.04 | -0.17 ± 0.09 | -0.14 ± 0.10 | -0.04 ± 0.10 | 0.58 ± 0.10 |
| 4318465066420528000*a | 5211 | 2.93 | 1.19 | -2.56 ± 0.12 | -2.49 ± 0.12 | 0.48 ± 0.05 | 0.11 ± 0.13 | 0.52 ± 0.05 | |||
Notes. The three ED-2 stars in our UVES programme, supplemented by an ED-2 star from the ESO archive (second entry) are shown in the first part. The bottom two entries correspond to the binary star of Gaia BH3, as estimated following the procedure described in this paper and as presented in Gaia Collaboration (2024), respectively.
The difference Teff between the two studies is due to different extinction maps used and is responsible for the relatively large difference in [Fe/H]I. The differences in the other ratios are likely due to systematic errors that are not accounted for in the quoted uncertainties, as the abundance ratios are rather insensitive to the choice of Teff. Sources for such systematic uncertainties include the use of different linelists, radiative transfer codes, and atmospheric models.
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