Table 12
Experiment 1: parameters determined for α Tau (Star 1) from the best fits to the optical spectra by the various participating teams.
| Starting parameters from photometry | Best fit parameters from spectroscopy | Additional quantities | ||||||||
| Code | T eff | log g | [Fe/H] | T eff | log g | [Fe/H] | [Ca/Fe] | RV | v mic | v mac |
| (K) | (g (cm s-2)) | (K) | (g (cm s-2)) | (km s-1) | (km s-1) | (km s-1) | ||||
|
|
||||||||||
| M1 | −0.3a | 3800 ± 100 | 0.75 ± 0.25 | −0.3 ± 0.25 | 54 | 2.5f | 3f | |||
| M2 | 3850/4000b | 3850 | 1.25 | 0.0 | 0.0 ± 0.1 | 54.5 | 1–2f | 4.5 | ||
| M3a | 3994 ± 100 | 1.54 ± 0.20 | −0.15 ± 0.10 | 53.9 ± 0.9 | 2f | g | ||||
| M3b | 3839 ± 80 | 0.94 ± 0.15 | −0.35 ± 0.10 | −0.2 ± 0.1c | 53.9 ± 0.9 | 2f | g | |||
| M4 | 4000d | 1.5d | 0.0d | 55 | 2f | 0f | ||||
| 3900d | 1.0d | −0.25d | 55 | 2f | 0f | |||||
| M6 | 3750–4250e | 1.0–1.5e | 4000 ± 200 | 1.0 ± 1.0 | 0.0 ± 0.5 | −0.3 ± 0.1 | 54.3 ± 0.5 | 2f | ||
| A1 | 3900 | 0.0 | 1.0 | 3950 ± 100 | 1.5 | −0.67 ± 0.08 | −0.23 ± 0.17 | 2 | –i | |
| A2 | 4788 ± 92 | 1.5 ± 0.1 | −0.4 ± 0.1 | 54.1 ± 0.4 | 2f | |||||
| A4 | 3900 | 1.0 | 0.0 | 54.3 | 1.3 | 1.5 | ||||
| A5 | 4000 ± 200 | 1.0 ± 0.25 | −0.29 | 1.6 ± 0.5 | ||||||
| P | 3910 ± 45d | 1.75 ± 0.25d | 0.0d | 54.71 | 3h | 0 | ||||
| 3800 ± 30d | 1.75 ± 0.25d | −0.5d | 54.71 | 3h | 0 | |||||
Notes. Methods for photometric parameter determination: M1, M2: MARCS models. Theoretical colour (V − K and J − K) – Teff calibrations (Bessell et al. 1998; van Eck et al. 2011). M6: Houdashelt et al. (2000). A1: Kučinskas et al. (2005).
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