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Table 3
Chemical abundances of the two stars and comparison to similar results in literature.
| HD 4306 | |||||||
|---|---|---|---|---|---|---|---|
| This paper | Honda et al. (2004) | Mashonkina et al. (2017) | Roederer et al. (2014) | ||||
| Elem | [X/H] - LTE | A(X) | N lines | A(X) - LTE | A(X) LTE | A(X) NLTE | A(X) -LTE |
| Mg I | –2.49 ± 0.09 | 5.04 | 4 | 5.25 | 5.27 | 5.30 | – |
| Ca I | –2.49 ± 0.02 | 3.82 | 14 | 3.97 | 3.98 | 4.11 | – |
| Sc II | –2.75 ± 0.07 | 0.42 | 5 | 0.45 | – | – | – |
| Ti I | –2.77 ± 0.02 | 2.13 | 11 | 2.55 | 2.41 | 2.63 | – |
| Ti II | –2.33 ± 0.04 | 2.57 | 23 | 2.55 | 2.58 | 2.59 | – |
| Cr II | –2.74 ± 0.04 | 2.90 | 2 | 2.97 | – | – | – |
| Mn I | –3.67 ± 0.01 | 1.72 | 2 | 2.08 | – | – | – |
| Fe I | –3.00 ± 0.01 | 4.45 | 99 | 4.62 | 4.60 | 4.71 | – |
| Fe II | –2.90 ± 0.02 | 4.55 | 16 | 4.62 | 4.76 | 4.76 | – |
| Sr II | –3.27 | –0.35 | 1 | –0.08 | 0.17 | 0.13 | – |
| Ba II | –4.05 ± 0.07 | –1.88 | 2 | –1.84 | –1.62 | –1.62 | – |
| HD 6268 | |||||||
| This paper | Honda et al. (2004) | Mashonkina et al. (2017) | Roederer et al. (2014) | ||||
| Elem | [X/H] - LTE | A(X) | N lines | A(X) - LTE | A(X) LTE | A(X) NLTE | [X/H] -LTE |
| Mg I | –2.13 ± 0.17 | 5.40 | 4 | 5.44 | – | – | 5.35 |
| Ca I | –2.27 ± 0.02 | 4.04 | 13 | 4.09 | – | – | 3.98 |
| Sc II | –2.65 ± 0.08 | 0.52 | 4 | 0.51 | – | – | 0.39 |
| Ti I | –2.55 ± 0.02 | 2.35 | 10 | 2.62 | – | – | 2.25 |
| Ti II | –2.23 ± 0.04 | 2.67 | 14 | 2.62 | – | – | 2.54 |
| Cr II | –2.37 ± 0.11 | 3.27 | 2 | 3.20 | – | – | 3.11 |
| Mn I | –3.10 ± 0.01 | 2.29 | 2 | 2.49 | – | – | 2.54 |
| Fe I | –2.51 ± 0.01 | 4.94 | 81 | 4.88 | – | – | 4.68 |
| Fe II | –2.51 ± 0.03 | 4.94 | 14 | 4.88 | – | – | 4.81 |
| Sr II | –2.59 | 0.33 | 1 | 0.36 | – | – | 0.33 |
| Ba II | –2.62 ± 0.07 | –0.45 | 2 | –0.45 | – | – | –0.46 |
Notes. For solar abundances – [X/H] – we considered Grevesse et al. (2007). For the literature data, we also provide the information on how the abundances were computed assuming the LTE approximation or NLTE.
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