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Table 1
Stellar parameters for the stars analyzed in the present paper.
| Parameters | HD 11755 | HD 12648 | HD 24064 | 8 UMi | Ref. |
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| α (J2000) | 01 58 50.087 | 02 18 59.654 | 03 56 36.297 | 14 56 48.353 | 1 |
| δ (J2000) | +73 09 08.58 | +85 44 10.22 | +74 04 48.12 | +74 54 03.34 | 1 |
| Spectral type | G5 | G5 | K0 | K0 | 1 |
| mv (mag) | 6.87 | 6.98 | 6.75 | 6.83 | 1 |
| Hipparcosscat (mag) | 0.010 | 0.009 | 0.009 | 0.008 | 1 |
| B − V (mag) | 1.216 ± 0.008 | 0.904 ± 0.008 | 1.513 ± 0.008 | 0.985 ± 0.010 | 1 |
| Parallax (mas) | 4.27 ± 0.42 | 6.29± 0.36 | 3.72 ± 0.44 | 6.25 ± 0.43 | 2 |
| Distance (pc) | 231.5 ± 22.7 | 158.4 ± 9.0 | 264.4 ± 31.2 | 159.1 ± 11.0 | 3 |
| Age (Gyr) | 10.2 ± 1.3 | 4.5 ± 1.0 | 9.0 ± 2.1 | 1.7 ± 0.2 | 4a |
| Teff (K) | 4312.5 ± 5.0 | 4835.8 ± 7.5 | 4052.5 ± 22.5 | 4847.4 ± 7.5 | 4 |
| [ Fe / H ] | −0.74 ± 0.02 | −0.57 ± 0.02 | −0.49 ± 0.06 | −0.03 ± 0.02 | 4 |
| log g | 1.67 ± 0.03 | 2.18 ± 0.03 | 1.44 ± 0.11 | 2.57 ± 0.03 | 4 |
| R⋆ (R⊙) | 27.3 ± 1.0 | 9.2 ± 0.6 | 38.0 ± 2.9 | 9.9 ± 0.4 | 4a |
| M⋆ (M⊙) | 0.9 ± 0.1 | 1.2 ± 0.1 | 1.0 ± 0.1 | 1.8 ± 0.1 | 4a |
| L⋆ [L⊙] | 145.72 | 45.01 | 352.90 | 55.94 | 3 |
| vrot sin i (km s-1) | 2.3 | 4.8 | 3.5 | 3.6 | 4b |
| Prot/sin i (days) | 600.5 | 97.0 | 549.3 | 139.1 | 4b |
| vmicro (km s-1) | 1.50 ± 0.04 | 1.52 ± 0.03 | 1.53 ± 0.09 | 1.48 ± 0.04 | 4 |
Notes.
(a)
Derived using the online tool (http://stevoapd.inaf.it/cgi-bin/param).
Reference. (1) Hipparcos; (2) van Leeuwen (2007); (3) Anderson & Francis (2012); (4) this work.
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