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Table 2

Computation of the error budget for HD 42618 and the line list of Reddy et al. (2003).

Statistical errors Systematic errors
σ line σ T eff σ log g σ ξ σ log g + ξ/Teff σ Teff + ξ/log g σ Teff + log g/ξ σ model σ sky σ fit σ
Teff [K] ... 17 ... ... ... 5 10 10 10 ... 25
log g [cgs] ... ... 0.03 ... 0.04 ... 0.03 0.02 0.01 ... 0.063
ξ [km s-1] ... ... ... 0.030 0.025 0.009 ... 0.030 0.006 ... 0.051
[Fe i/h] 0.027 0.015 0.000 0.004 0.011 0.002 0.003 0.002 0.015 ... 0.037
[Fe ii/H] 0.014 0.007 0.012 0.006 0.010 0.014 0.002 0.003 0.015 ... 0.031
[Li i/H] ... 0.02 0.00 0.00 0.02 0.00 0.01 0.02 0.02 0.05 0.065
[C i/Fe] 0.023 0.015 0.005 0.005 0.006 0.003 0.002 0.004 0.003 ... 0.030
[Na i/Fe] 0.007 0.005 0.008 0.003 0.006 0.009 0.000 0.001 0.005 ... 0.018
[Mg i/Fe] ... 0.003 0.012 0.000 0.008 0.013 0.005 0.001 0.007 ... 0.050a
[Al i/Fe] ... 0.005 0.006 0.005 0.005 0.008 0.002 0.000 0.002 ... 0.050a
[Si i/Fe] 0.019 0.002 0.005 0.003 0.008 0.006 0.001 0.001 0.002 ... 0.023
[Si ii/Fe] ... 0.023 0.006 0.002 0.009 0.005 0.001 0.003 0.004 ... 0.050a
[S i/Fe] ... 0.015 0.003 0.005 0.007 0.001 0.001 0.003 0.000 ... 0.050a
[Ca i/Fe] 0.019 0.010 0.009 0.001 0.005 0.010 0.002 0.002 0.003 ... 0.027
[Sc ii/Fe] 0.011 0.004 0.008 0.004 0.006 0.006 0.009 0.001 0.003 ... 0.020
[Ti i/Fe] 0.010 0.015 0.007 0.001 0.002 0.008 0.003 0.003 0.003 ... 0.022
[V i/Fe] 0.016 0.017 0.006 0.004 0.004 0.008 0.006 0.000 0.002 ... 0.027
[Cr i/Fe] 0.014 0.012 0.007 0.001 0.001 0.008 0.001 0.000 0.001 ... 0.022
[Co i/Fe] 0.028 0.007 0.005 0.003 0.002 0.007 0.002 0.001 0.001 ... 0.031
[Ni i/Fe] 0.023 0.007 0.005 0.001 0.003 0.006 0.000 0.001 0.001 ... 0.026
[Zn i/Fe] 0.018 0.005 0.002 0.001 0.007 0.002 0.004 0.001 0.001 ... 0.021
[Sr i/Fe] ... 0.015 0.008 0.003 0.001 0.008 0.001 0.001 0.004 ... 0.050a
[Y ii/Fe] 0.023 0.003 0.006 0.002 0.005 0.006 0.004 0.002 0.004 ... 0.026
[Zr ii/Fe] ... 0.004 0.006 0.004 0.005 0.004 0.010 0.002 0.001 ... 0.050a
[Ba ii/Fe] 0.055 0.001 0.000 0.010 0.001 0.002 0.008 0.003 0.011 ... 0.058
[Ce ii/Fe] 0.011 0.001 0.006 0.002 0.008 0.005 0.009 0.004 0.002 ... 0.019
[Nd ii/Fe] ... 0.001 0.007 0.004 0.010 0.005 0.013 0.003 0.003 ... 0.050a
[Eu ii/Fe] ... 0.004 0.006 0.005 0.006 0.005 0.010 0.000 0.001 ... 0.050a

Notes.The line-to-line scatter is given by σline. Other statistical errors arise from uncertainties in the effective temperature (σTeff), surface gravity (σlog g), or microturbulence (σξ). The changes in, for instance, log g, ξ, and abundances associated to varying Teff by its uncertainty are noted as σlog g + ξ/Teff. As discussed in Sect. 4, the systematic uncertainties are related to the choice of either Kurucz or MARCS model atmospheres (σmodel), the use of a skylight solar spectrum (σsky), or the subjectivity in estimating the best fit to the lithium feature (σfit). The last column gives the total uncertainty.

(a)

Fixed error value.

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