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Table 7.
Statistics of orbital parameters for each of the CEMP sub-groups.
| Property | CEMP-no | CEMP-s | CEMP-r, r/s | C-normal |
|---|---|---|---|---|
| Fraction of total sample | 0.34 | 0.41 | 0.09 | 0.16 |
| U < 0 km s−1 | 0.58 ± 0.03 | 0.47 ± 0.03 | 0.33 ± 0.12 | 0.62 ± 0.07 |
| V < 0 km s−1 | 0.45 ± 0.03 | 0.55 ± 0.03 | 0.22 ± 0.11 | 0.56 ± 0.07 |
| W < 0 km s−1 | 0.45 ± 0.03 | 0.50 ± 0.03 | 0.33 ± 0.12 | 0.44 ± 0.07 |
| e > 0.5 | 0.79 ± 0.04 | 0.70 ± 0.03 | 0.78 ± 0.14 | 0.75 ± 0.08 |
| Rapo < 13 kpc | 0.45 ± 0.03 | 0.60 ± 0.03 | 1.00 ± 0.16 | 0.75 ± 0.08 |
| Rapo > 20 kpc | 0.21 ± 0.03 | 0.28 ± 0.03 | ... | 0.19 ± 0.06 |
| Rperi < 3 kpc | 0.64 ± 0.04 | 0.60 ± 0.03 | 0.67 ± 0.13 | 0.38 ± 0.07 |
| vLSR < 100 kpc | 0.03 ± 0.03 | 0.05 ± 0.03 | ... | ... |
| vLSR > 300 kpc | 0.48 ± 0.03 | 0.55 ± 0.03 | 0.22 ± 0.11 | 0.50 ± 0.07 |
| σV (km s−1) | 127 ± 17 | 142 ± 17 | 75 ± 20 | 103 ± 20 |
| ⟨Rapo⟩ (kpc) | 14.1 | 12.2 | 10.1 | 11.2 |
| ⟨Rperi⟩ (kpc) | 2.2 | 2.2 | 2.1 | 3.5 |
| ⟨Zmax⟩ (kpc) | 7.5 | 5.9 | 5.1 | 5.1 |
| ⟨e⟩ | 0.74 | 0.68 | 0.66 | 0.58 |
Notes. The fractions listed within each sub-group satisfy the given kinematic condition and median values for the parameters. Error bars are solely based on Poisson statistics.
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