Table 5
Uncertainty budget for the abundances of the mixing indicators in the case of HD 175679.
| σ int | σ Teff | σ log g | σ ξ | σ normalisation | σ fit | σ Ni | σ D0 | σ total | |
|
|
|||||||||
| Δlog ϵ(O) | 0.05a | +0.11 | +0.08 | +0.04 | +0.06 | 0.03 | +0.01 | +0.00 | 0.17 |
| Δ[O/Fe] | 0.05a | +0.06 | +0.08 | +0.05 | +0.06 | 0.03 | +0.01 | +0.00 | 0.14 |
|
|
|||||||||
| Δlog ϵ(C2 5086) | ... | +0.06 | +0.03 | +0.02 | +0.04 | 0.03 | +0.00 | +0.04 | 0.10 |
| Δlog ϵ(C2 5135) | ... | +0.06 | +0.04 | +0.02 | +0.04 | 0.03 | +0.00 | +0.04 | 0.10 |
| Δlog ϵ(C2) | 0.03 | +0.06 | +0.04 | +0.02 | +0.04 | 0.03 | +0.00 | +0.04 | 0.11 |
| Δ[C/Fe] | 0.03 | +0.01 | +0.04 | +0.03 | +0.04 | 0.03 | +0.00 | +0.04 | 0.09 |
|
|
|||||||||
| Δlog ϵ(CN 6332) | ... | +0.08 | –0.01 | +0.03 | +0.04 | 0.03 | +0.00 | +0.08 | 0.13 |
| Δlog ϵ(CN 8003) | ... | +0.08 | +0.00 | +0.03 | +0.06 | 0.03 | +0.00 | +0.09 | 0.14 |
| Δlog ϵ(N) | 0.05 | +0.08 | –0.01 | +0.03 | +0.05 | 0.03 | +0.00 | +0.08 | 0.14 |
| Δ[N/Fe] | 0.05 | +0.03 | –0.01 | +0.04 | +0.05 | 0.03 | +0.00 | +0.08 | 0.13 |
|
|
|||||||||
| Δ[N/C] | 0.06 | +0.02 | –0.04 | +0.01 | +0.01 | 0.04 | +0.00 | +0.04 | 0.10 |
| Δ[N/O] | 0.07 | –0.03 | –0.09 | –0.01 | –0.01 | 0.04 | –0.01 | +0.08 | 0.15 |
| Δ[C/O] | 0.06 | –0.05 | –0.05 | –0.02 | –0.02 | 0.04 | –0.01 | +0.04 | 0.12 |
|
|
|||||||||
| Δ12C/13C | ... | –0.3 | –0.2 | +0.00 | –5 | 1 | +0.00 | +0.00 | 5.1 |
|
|
|||||||||
| Δ[Li/H] | 0.05a | +0.09 | –0.04 | +0.03 | +0.05 | 0.05 | +0.00 | +0.00 | 0.13 |
Notes. The first column gives the line-to-line scatter. The quantities σTeff, σlog g, and σξ give the uncertainties associated to the following changes in the atmospheric parameters: ΔTeff = +80 K, Δlog g = +0.18 dex, and Δξ = +0.07 km s-1. Note that the two other parameters were simultaneously adjusted to fulfil excitation/ionisation equilibrium of iron or to have the Fe i abundances that are independent of the line strength. The uncertainty associated to a continuum level shifted upwards by 1% is provided by σnormalisation. As the fit quality was evaluated by eye, σfit gives the rough uncertainty associated to this procedure. The error resulting from a lowering of the Ni abundance by its uncertainty (0.05 dex) is given by σNi. Finally, the effect of lowering the adopted dissociation energy of the C2 and CN molecules by 0.1 eV is given by σD0.
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