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Table 2
Abundance results for K2-138.
| Abundance ratio | Default Teff scale | Cooler Teff scale |
|---|---|---|
| [Fe/H] | +0.08 ± 0.05 (42+4) | +0.01 |
| [C I/Fe] | −0.04 ± 0.08 (3) | +0.03 |
| [C2/Fe] | −0.07 ± 0.09 (2) | −0.01 |
| [O I/Fe] | +0.03 ± 0.10 (1) | −0.01 |
| [Na I/Fe] | +0.02 ± 0.06 (3) | −0.04 |
| [Mg I/Fe] | −0.06 ± 0.08 (3) | −0.05 |
| [Al I/Fe] | +0.01 ± 0.05 (2) | −0.04 |
| [Si I/Fe] | +0.01 ± 0.04(10) | +0.00 |
| [Ca I/Fe] | +0.04 ± 0.06 (3) | −0.05 |
| [Sc I/Fe] | −0.03 ± 0.10 (4) | −0.06 |
| [Sc II/Fe] | −0.01 ± 0.05 (5) | −0.01 |
| [Ti I/Fe] | +0.01 ± 0.08(14) | −0.07 |
| [Ti II/Fe] | +0.01 ± 0.06 (10) | +0.00 |
| [V I/Fe] | +0.03 ± 0.08 (5) | −0.07 |
| [Cr I/Fe] | +0.03 ± 0.05 (7) | −0.04 |
| [Cr II/Fe] | +0.08 ± 0.04 (4) | +0.01 |
| [Mn I/Fe] | +0.04 ± 0.07 (5) | −0.05 |
| [Co I/Fe] | +0.00 ± 0.06 (7) | −0.03 |
| [Ni I/Fe] | +0.00 ± 0.04(14) | −0.02 |
| [Cu I/Fe] | −0.02 ± 0.03 (2) | −0.02 |
| [Zn I/Fe] | −0.01 ± 0.03 (3) | +0.00 |
| [Sr I/Fe] | +0.01 ± 0.09 (1) | −0.07 |
| [Y II/Fe] | +0.02 ± 0.07 (4) | −0.01 |
| [Zr II/Fe] | +0.06 ± 0.06 (2) | −0.02 |
| [Ba II/Fe] | +0.02 ± 0.07(1) | −0.02 |
| [Ce II/Fe] | +0.01 ± 0.08 (5) | −0.02 |
| [Nd II/Fe] | +0.07 ± 0.05 (3) | −0.02 |
| [Eu II/Fe] | +0.04 ± 0.08 (3) | −0.02 |
| [C I/O I] | −0.07 ± 0.13 | +0.04 |
| [C2/O I] | −0.10 ± 0.12 | +0.00 |
| [Mg I/Si I] | −0.07 ± 0.08 | −0.05 |
Notes. The last column shows the impact of lowering Teff by 50 K (see Sect. 2.1), while keeping log g and ξ unchanged. The number in brackets gives the number of lines the abundance is based on. For iron, the number of Fe I and Fe II lines is given.
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