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Table C.2
Coefficients a and b for the Teff calibration from V−K colours via Eqs. (C.3) and (C.4). Taken from di Benedetto (1993).
| Spectral type | Luminosity class | (V−K)0 | a | b |
|
|
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| G-K | II-III-IV-V | 1.4−3.7 | 3.927 | 0.122 |
| M | III | 3.7−10 | 3.833 | 0.101 |
| M | II | 3.7−10 | 3.859 | 0.108 |
| F-G-K-M | I | 0.6−10 | 3.954 | 0.133 |
| M | IV-V | 3.7−10 | 3.954 | 0.133 |
| M | Mira | 3.7−10 | 3.954 | 0.133 |
| C | Carbon star | 3.7−10 | 3.954 | 0.133 |
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