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Table 4.
Ages and relevant parameters.
| Parameter | HD 2133 | Ref. | HD 114174 | Ref. | CD-56 7708 | Ref. |
|---|---|---|---|---|---|---|
| MS star | ||||||
| Age isochrones (Gyr) | 4.8 ± 1.2 | 5 | 4.7 ± 2.3 | 4 | 2.6 ± 2.2 | 5 |
| Age isochrones (Gyr) | 6.4 ± 0.7 | 7 | ||||
| Age isochrones (Gyr) | 7.4 ± 2.0 | 5 | ||||
| Mass isochrones (M⊙) | 1.12 ± 0.03 | 5 | 0.982 ± 0.014 | 5 | 1.05 ± 0.03 | 5 |
| Radius isochrones (R⊙) | 1.29 ± 0.03 | 5 | 1.059 ± 0.021 | 5 | 0.99 ± 0.03 | 5 |
| Rotational period (d) | 1.316 | 5 | 34.6 | 5 | 2.326 | 5 |
| bp − rp | 0.735 | 3 | 0.830 | 3 | 0.897 | 3 |
| Age gyrochronology (yr) | 1.5 × 107 | 5 | 5.8 × 109 | 5 | 1.8 × 107 | 5 |
| White dwarf | ||||||
| Spectral type | DA1.9 | 1 | DA1.0 | 1 | ||
| Teff (literature) (K) | 26800 | 1 | 3810 | 4 | 49460 | 1 |
| Teff (literature) (K) | 29724 ± 158 | 8 | 49037 ± 263 | 8 | ||
| Teff (MCMC) (K) | 24569 ± 49 | 6 | 5890 ± 270 | 6 | 42103 ± 4200 | 6 |
| Mass (literature) (M⊙) | 0.40 ± 0.14 | 8 | 0.524 ± 0.04 | 8 | ||
| Mass (MCMC) (M⊙) | 0.42 ± 0.00 | 6 | 0.75 ± 0.03 | 6 | 0.58 ± 0.04 | 6 |
| Cooling age (MCMC) (yr) | (2.03 ± 0.01)×106 | 6 | (5.57 ± 0.02)×109 | 6 | (4.04 ± 0.05)×106 | 6 |
References. 1: Holberg et al. (2013); 2: Cutri et al. (2003); 3: Gaia Collaboration (2016, 2018); 4: Bacchus et al. (2017); 5: this paper; 6: this paper using Bergeron et al. (1995) pure hydrogen cooling sequences; 7: Tucci Maia et al. (2016); 8: Joyce et al. (2018).
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