Table 1
Physical properties of WW Psa and TX Psa.
| Parameter | WW Psa | TX Psa | Note |
|
|
|||
| V (mag) | 12.10 ± 0.02 | 13.35 ± 0.02 | 1 |
| V−Ks (mag) | 5.16 ± 0.03 | 5.51 ± 0.03 | 2 |
| Sp. Type | M4V | M4.5V | 3 |
| Dist. (pc) | 20.75 ± 0.25 | 20.75 ± 0.25 | 4 |
| ⟨RV⟩ (km s-1) | 2.42 ± 0.84 | 2.54 ± 0.60 | 1 |
| X, Y, Z (pc) | 9.48, 2.10, –18.34 | 9.48, 2.10, –18.34 | 1 |
| U, V, W (km s-1) | –10.46 ± 0.40, –16.04 ± 0.21, –9.98 ± 0.75 | –10.41 ± 0.31, –16.03 ± 0.20, –10.09 ± 0.54 | 1 |
| vsini (km s-1) | 12 | 22 | 5 |
| 12.1 | 16.8 | 6 | |
| 14 ± 1.73 | 24.3 ± 4.93 | 7 | |
| 13.9 ± 0.5 | 22.7 ± 0.3 | 8 | |
| Teff (K) | 3200 ± 100 | 3050 ± 100 | 1 |
| M (M⊙) | 0.19 ± 0.04 | 0.11 ± 0.03 | 1 |
| L (L⊙) | 0.046 ± 0.006 | 0.021 ± 0.003 | 1 |
| R (R⊙) | 0.70 ± 0.13 | 0.52 ± 0.10 | 1 |
| i (°) | 53 |
60 |
1 |
| Li EW (mÅ) | no Li | 450 | 9, 10 |
| P (d) | 2.37 ± 0.01 | 1.086 ± 0.003 | 1 |
| Age (Myr) (Li) (Feiden models) | 29 ± 2 | 1 | |
| Agea (Myr) (Feiden isochr.) | <20 | 1 | |
| Ageb (Myr) (Feiden isochr.) | 27 ± 7 | 1 | |
Notes.
Reference. 1) This work; 2) 2MASS; 3) Shkolnik et al. (2009); 4) Gaia Collaboration (2016); 5) Christian & Mathioudakis (2002); 6) Torres et al. (2006); 7) Jayawardhana et al. (2006); 8) Bailey et al. (2012); 9) Song et al. (2002); 10) Torres et al. (2006).
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