Table 3.
[Fe/H]e dispersion: Effect of the normalisation window.
| Norm. window | Interpolation | ⟨[Fe/H]⟩ | σ([Fe/H]) |
|---|---|---|---|
| (1) | (2) | (3) | (4) |
| 30 | L | −1.950 | 0.084 |
| Q | −1.926 | 0.087 | |
| C | −1.930 | 0.085 | |
| 60 | L | −1.966 | 0.081 |
| Q | −1.942 | 0.084 | |
| C | −1.945 | 0.082 | |
| 120 | L | −1.934 | 0.086 |
| Q | −1.907 | 0.088 | |
| C | −1.911 | 0.089 | |
Notes. Dispersion along the giant branch with different normalisation windows, using GSL in the wavelength range 475–930 nm. (1) Running-mean normalisation window given as the number of wavelength bins. (2) Interpolation schema; L: linear, Q: quadratic, C: cubic (3) ⟨[Fe/H]⟩ is the average of the average [Fe/H]e determined in Teff bins of 250 K. (4) σ([Fe/H]) is the square root of the mean variance of [Fe/H]e determined in Teff bins of 250 K.
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