Table 6
Derived metallicities for our sample and comparison with previous abundance determinations.
| Target | This work | Bo05 | Be06 | JA09 | SL10 | R10 |
|
|
||||||
| HD 101930A | +0.20 ± 0.06 | |||||
| HD 101930B | + 0.09 ± 0.10 | −0.16 | +0.08 c | −0.05 | ||
| GJ105A | −0.05 ± 0.01 | −0.19 s | −0.12 | |||
| GJ105B | −0.06 ± 0.15 | −0.15 | −0.09 | +0.06 c | −0.07 | |
| GJ250A | −0.03 ± 0.05 | −0.15 s | ||||
| GJ250B | −0.05 ± 0.05 | −0.18 | +0.05 c | −0.09 | −0.04 | |
|
|
||||||
| GJ176 | +0.04 ± 0.02 | −0.06 | +0.18 | +0.05 | ||
| GJ317 | +0.20 ± 0.14 | −0.22 | −0.10 c | −0.21 | ||
| GJ436 | +0.08 ± 0.05 | −0.05 | −0.32 | +0.25 | +0.08 | +0.00 |
| GJ581 | −0.15 ± 0.03 | −0.25 | −0.33 | −0.10 | −0.21 | −0.02 |
| GJ628 | +0.08 ± 0.03 | −0.13 | +0.12 c | −0.02 | ||
| GJ674 | −0.11 ± 0.13 | −0.28 | −0.11 | −0.22 | ||
| GJ849 P82&84 | +0.35 ± 0.10 | +0.17 | +0.58 | +0.37 | +0.49 | |
| GJ876 | +0.12 ± 0.15 | +0.02 | −0.12 | +0.37 | +0.24 | +0.43 |
Notes. Column descriptions: this work: our results. The quoted errors are a combination of systematic errors from the uncertainties in atmospheric parameters and the uncertainty from the fitting routine (see Sect. 4.3). Bo05: values calculated from the calibration equation of Bonfils et al. (2005a), except for those marked with an “s”, which are spectroscopically determined. Be06: Bean et al. (2006a). JA09: values from Johnson & Apps (2009), except for those marked with a “c”, which are determined from our collected colours and the provided calibration (extrapolation slightly outside the valid range for HD 101930B). SL10: values calculated from the calibration equation of Schlaufman & Laughlin (2010). R10: Rojas-Ayala et al. (2010).
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