Table 1
Final results before and after corrections for Galactic chemical evolution (GCE; see Sect. 6.3.2).
| α Cen A | α Cen B | A – B | |||||
|---|---|---|---|---|---|---|---|
| N | Before GCE | After GCE | N | Before GCE | After GCE | ||
| Teff [K] | 9 | 5829 ± 6 | 9 | 5189 ± 18 | ... | ||
| logg [cgs] | 9 | 4.35 ± 0.02 | 9 | 4.30 ± 0.05 | ... | ||
| ξ [km s−1] | 9 | 1.265 ± 0.012 | 9 | 0.950 ± 0.039 | ... | ||
| [Fe/H]a | 9 | 0.237 ± 0.007 | ... | 9 | 0.221 ± 0.016 | ... | 0.012 ± 0.018 |
| [C/Fe] | 2 | 0.025 ± 0.018 | –0.018 ± 0.036 | 2 | –0.001 ± 0.045 | –0.044 ± 0.054 | 0.037 ± 0.049 |
| [O/Fe] | 6 | –0.046 ± 0.014 | –0.062 ± 0.019 | 6 | –0.074 ± 0.040 | –0.090 ± 0.042 | 0.030 ± 0.043 |
| [Na/Fe] | 7 | 0.094 ± 0.010 | 0.058 ± 0.027 | 7 | 0.128 ± 0.036 | 0.092 ± 0.044 | –0.029 ± 0.038 |
| [Mg/Fe] | 6 | 0.013 ± 0.023 | –0.004 ± 0.026 | 6 | 0.044 ± 0.041 | 0.027 ± 0.043 | –0.028 ± 0.048 |
| [Al/Fe] | 7 | 0.044 ± 0.013 | 0.013 ± 0.025 | 7 | 0.077 ± 0.031 | 0.046 ± 0.038 | –0.030 ± 0.034 |
| [Si/Fe]b | 8 | 0.024 ± 0.009 | 0.009 ± 0.014 | 8 | 0.034 ± 0.018 | 0.019 ± 0.021 | –0.007 ± 0.021 |
| [Ca/Fe]b | 8 | –0.020 ± 0.010 | –0.017 ± 0.011 | 8 | 0.001 ± 0.030 | 0.004 ± 0.030 | –0.024 ± 0.032 |
| [Sc/Fe]b | 4 | 0.029 ± 0.014 | –0.002 ± 0.026 | 5 | 0.036 ± 0.018 | 0.005 ± 0.028 | –0.011 ± 0.024 |
| [Ti/Fe]b | 8 | 0.016 ± 0.011 | 0.005 ± 0.014 | 8 | 0.063 ± 0.033 | 0.052 ± 0.034 | –0.044 ± 0.035 |
| [V/Fe] | 5 | 0.019 ± 0.017 | 0.017 ± 0.017 | 5 | 0.073 ± 0.050 | 0.071 ± 0.050 | –0.049 ± 0.053 |
| [Cr/Fe]b | 8 | 0.011 ± 0.011 | 0.017 ± 0.012 | 7 | 0.043 ± 0.033 | 0.049 ± 0.033 | –0.038 ± 0.036 |
| [Mn/Fe] | 2 | 0.034 ± 0.019 | 0.024 ± 0.021 | 0 | ... | ... | ... |
| [Co/Fe] | 4 | 0.051 ± 0.019 | 0.040 ± 0.020 | 4 | –0.019 ± 0.044 | –0.030 ± 0.045 | 0.065 ± 0.048 |
| [Ni/Fe] | 8 | 0.049 ± 0.009 | 0.028 ± 0.018 | 8 | 0.057 ± 0.019 | 0.036 ± 0.024 | –0.009 ± 0.022 |
| [Cu/Fe] | 2 | 0.058 ± 0.020 | 0.016 ± 0.035 | 2 | 0.070 ± 0.034 | 0.028 ± 0.045 | –0.012 ± 0.040 |
| [Zn/Fe] | 4 | 0.029 ± 0.027 | 0.001 ± 0.033 | 4 | 0.075 ± 0.031 | 0.047 ± 0.037 | –0.044 ± 0.042 |
| [Y/Fe] | 3 | –0.034 ± 0.013 | 0.008 ± 0.032 | 3 | 0.047 ± 0.029 | 0.089 ± 0.041 | –0.080 ± 0.032 |
| [Zr/Fe] | 1 | 0.033 ± 0.053 | 0.064 ± 0.057 | 1 | 0.122 ± 0.060 | 0.153 ± 0.064 | –0.090 ± 0.081 |
| [Ba/Fe] | 5 | –0.052 ± 0.025 | 0.017 ± 0.055 | 5 | –0.042 ± 0.025 | 0.027 ± 0.055 | –0.017 ± 0.036 |
| [Ce/Fe] | 1 | –0.065 ± 0.055 | –0.034 ± 0.059 | 0 | ... | ... | ... |
Notes. The values are the average ones derived from the differential, unconstrained analysis (Tables B.2 to B.4). N gives the number of line lists the value is based on. We note that the values in the last column are slightly different from the straight subtraction of those corresponding to α Cen A and B because not exactly the same features were used after trimming the line lists (Sect. 5.2). (a) Weighted average of the Fe I- and Fe II-based abundances. (b)Only based on one ion (Sect. 5.2).
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