Open Access
Table 1
Classification ranges for separate stellar parameters, where XMP, MP, MR, and XMR correspond to extremely metal poor, metal poor, metal rich, and extremely metal rich, respectively.
| Teff (K) | log ɡ (dex) | [Fe/H] (dex) | |||
|---|---|---|---|---|---|
| Class | Range | Class | Range | Class | Range |
| M | <3500 | C1 | <2.0 | XMP | <−2 |
| K | 3500–5000 | C2 | 2.0–3.0 | MP | (−2)−(−1) |
| G | 5000–6000 | C3 | 3.0–3.5 | MR | (−1)−0 |
| F | 6000–7500 | C4 | 3.5–4.0 | XMR | ≥0 |
| A | 7500–10000 | C5 | 4.0–4.5 | ||
| B | 10000–25 000 | C6 | ≥4.5 | ||
| O | ≥25 000 | ||||
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