Table G.1.
Indices used for spectral classification of K- and late G-type stars.
| Index | weight | G8 | G9 | K0 | K1 | K2 | K3 | K4 | K5 | K6 | K7 | M0 | Uncertainty | Source |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NaI 5890Å | 2.0 | 1.424 | 1.971 | 2.519 | 3.066 | 3.613 | 4.160 | 4.708 | 5.255 | 5.802 | 6.349 | 6.896 | 0.112 | This work |
| CaI 6162Å | 1.0 | 0.850 | 1.029 | 1.207 | 1.386 | 1.564 | 1.743 | 1.921 | 2.099 | 2.278 | 2.456 | 2.635 | 0.033 | This work |
| CaI 6103Å | 1.0 | 0.323 | 0.358 | 0.393 | 0.428 | 0.463 | 0.498 | 0.533 | 0.567 | 0.602 | 0.637 | 0.672 | 0.018 | This work |
| NaI 8183Å | 1.0 | 0.279 | 0.325 | 0.372 | 0.418 | 0.465 | 0.511 | 0.558 | 0.604 | 0.651 | 0.697 | 0.743 | 0.008 | This work |
| NaI 8195Å | 1.0 | 0.357 | 0.412 | 0.468 | 0.523 | 0.578 | 0.634 | 0.689 | 0.744 | 0.800 | 0.855 | 0.910 | 0.016 | This work |
| CaI 8690Å | 2.0 | 0.315 | 0.358 | 0.401 | 0.444 | 0.487 | 0.530 | 0.573 | 0.616 | 0.659 | – | – | 0.016 | This work |
| MgI 8806Å | 1.75 | 0.665 | 0.713 | 0.761 | 0.809 | 0.857 | 0.905 | 0.954 | 1.002 | 1.050 | – | – | 0.029 | This work |
| MgII 8824Å | 2.25 | 0.230 | 0.263 | 0.296 | 0.329 | 0.362 | 0.395 | 0.428 | 0.460 | 0.493 | 0.526 | 0.559 | 0.010 | This work |
| KI 7665Å/7699Å | 1.0 | 2.531 | 2.442 | 2.354 | 2.265 | 2.177 | 2.088 | 2.000 | 1.912 | 1.823 | 1.735 | 1.646 | 0.111 | This work |
| CaII 8663Å/CaI 8690Å | 1.75 | 3.639 | 3.447 | 3.256 | 3.065 | 2.873 | 2.682 | 2.490 | 2.299 | 2.108 | 1.916 | 1.725 | 0.189 | This work |
| MgI 8806Å/MgII 8824Å | 1.25 | 2.834 | 2.722 | 2.611 | 2.499 | 2.387 | 2.276 | 2.164 | 2.052 | 1.941 | 1.829 | 1.717 | 0.137 | This work |
| TiO 7140Å | 1.5 | – | – | – | – | – | – | – | -2 | -1.5 | -1 | 0 | 0.1 | Jeffries et al. (2007) |
| Oliveira et al. (2003) |
Notes. Indices listed here are equivalent widths and their ratios, as indicated by the index name. Values were obtained from linear fitting of equivalent widths to spectral types. Listed uncertainties represent the uncertainty of this fit. The final spectral type is a weighted average of corresponding spectral types to each index and their weights. Indices and weights were calibrated on the Class III spectra listed in the Tab. F.1.
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