Table 4.
Errors in the abundances of Li, O, Na, Mg, and K determined in TO stars of 47 Tuc.
| Element | Line λnm | Line quality | σ(Teff) dex | σ(log g) dex | σ(ξt) dex | σ(cont) dex | σ(fit) dex | σ(A)tot dex |
|---|---|---|---|---|---|---|---|---|
| Li I | 670.80 | A | ±0.09 | ∓0.01 | ∓0.01 | 0.03 | 0.01 | 0.10 |
| B | ±0.09 | ∓0.01 | ∓0.01 | 0.03 | 0.02 | 0.10 | ||
| C | ±0.09 | ∓0.01 | ∓0.01 | 0.03 | 0.03 | 0.10 | ||
| O I | 777.19 | A | ±0.09 | ∓0.03 | ∓0.02 | 0.02 | 0.01 | 0.10 |
| B | ±0.09 | ∓0.03 | ∓0.02 | 0.02 | 0.02 | 0.10 | ||
| C | ±0.09 | ∓0.03 | ∓0.02 | 0.02 | 0.03 | 0.10 | ||
| O I | 777.53 | A | ±0.09 | ∓0.03 | ∓0.02 | 0.02 | 0.01 | 0.10 |
| B | ±0.09 | ∓0.03 | ∓0.02 | 0.02 | 0.03 | 0.10 | ||
| C | ±0.09 | ∓0.03 | ∓0.02 | 0.02 | 0.04 | 0.11 | ||
| Na I | 818.32 | A | ±0.06 | ∓0.02 | ∓0.06 | 0.02 | 0.01 | 0.09 |
| B | ±0.06 | ∓0.02 | ∓0.06 | 0.02 | 0.02 | 0.09 | ||
| C | ±0.06 | ∓0.02 | ∓0.06 | 0.02 | 0.03 | 0.09 | ||
| Na I | 819.48 | A | ±0.06 | ∓0.02 | ∓0.06 | 0.03 | 0.01 | 0.09 |
| B | ±0.06 | ∓0.02 | ∓0.06 | 0.03 | 0.02 | 0.09 | ||
| C | ±0.06 | ∓0.02 | ∓0.06 | 0.03 | 0.03 | 0.10 | ||
| Mg I | 769.16 | A | ±0.04 | ∓0.03 | ∓0.04 | 0.03 | 0.01 | 0.07 |
| B | ±0.04 | ∓0.03 | ∓0.04 | 0.03 | 0.01 | 0.07 | ||
| C | ±0.04 | ∓0.03 | ∓0.04 | 0.03 | 0.02 | 0.07 | ||
| K I | 769.89 | A | ±0.08 | ∓0.02 | ∓0.10 | 0.02 | 0.01 | 0.13 |
| B | ±0.08 | ∓0.02 | ∓0.10 | 0.02 | 0.02 | 0.13 | ||
| C | ±0.08 | ∓0.02 | ∓0.10 | 0.02 | 0.03 | 0.13 |
Notes. The sign ± or ∓ reflects the change in the elemental abundance, which occurs due to the increase (top sign) or decrease (bottom sign) by the value of typical uncertainty (Sect. 2.3.4) in Teff, log g, ξt, continuum placement, and the line profile fit (Cols. 4–8). For example, an increase in the effective temperature leads to increasing abundance (±), while increasing microturbulence velocity results in decreasing abundance (∓). The total estimated uncertainty is provided in Col. 9.
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