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Table 2
Incidence of CEMP, NEMP and CNEMP stars among stars with carbon and nitrogen measurements.
| Selection | CEMP | NEMP | CNEMP | fNEMP | fmax(90%/99%/99.9%) | fCNEMP | fmax(90%/99%/99.9%) |
|
|
|||||||
| all | 156 | 14 | 8 | 0.086 | 0.051 | ||
| all, log g ≤ 4 | 142 | 12 | 8 | 0.082 | 0.122/0.156/0.185 | 0.056 | 0.092/0.123/0.149 |
|
|
|||||||
| [Fe/H] < −2.8 | 26 | 8 | 5 | 0.276 | 0.192 | ||
| [Fe/H] < −2.8, log g ≤ 4 | 24 | 7 | 5 | 0.269 | 0.411/0.514/0.588 | 0.208 | 0.352/0.459/0.539 |
| − 2.8 ≤ [Fe/H] ≤ −1.8 | 101 | 3 | 2 | 0.029 | 0.020 | ||
| − 2.8 ≤ [Fe/H] ≤ −1.8, log g ≤ 4 | 92 | 2 | 2 | 0.022 | 0.057/0.088/0.116 | 0.022 | 0.057/0.088/0.116 |
| [Fe/H] > −1.8 | 29 | 3 | 1 | 0.097 | 0.034 | ||
| [Fe/H] > − 1.8, log g ≤ 4 | 26 | 3 | 1 | 0.107 | 0.223/0.316/0.390 | 0.038 | 0.142/0.229/0.304 |
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| [Fe/H] ≥ −2.8 | 130 | 6 | 3 | 0.045 | 0.023 | ||
| [Fe/H] ≥ −2.8, log g ≤ 4 | 118 | 5 | 3 | 0.042 | 0.076/0.106/0.131 | 0.025 | 0.056/0.083/0.106 |
Notes. The columns labelled fmax give the 90%, 99% and 99.9% upper limits to fNEMP and fCNEMP for the selections with log g ≤ 4.
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