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Table 3
Physical properties of the three stars considered in this work (for details and references see Sect. 4.1).
| Object | HIP 103389 | HIP 107350 | HIP 114948 |
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| Name | HR 8013, HD 199260 | HN Peg, HD 206860 | HR 8843, HD 219482 |
| Distance (pc) | 21.97 | 17.88 | 20.54 |
| Spectral type and luminosity class | F7 V | G0 V | F7 V |
| Range of spectral types | F6V − F8V | G0IV − V | F6V − F8V |
| V, B − V | 5.70, 0.51 | 5.96, 0.59 | 5.64, 0.52 |
| Absolute magnitude MV, bolometric correction | 3.99, − 0.02 | 4.70, − 0.05 | 4.08, − 0.02 |
| Bolometric luminosity, L⋆ [L⊙] | 2.025 | 1.090 | 1.867 |
| Effective temperature (K) | 6257 | 5952 | 6240 |
| Surface gravity, log g⋆ | 4.36 | 4.44 | 4.31 |
| Radius, R⋆ [R⊙] | 1.2 | 0.99 | 1.17 |
| Metallicity [Fe/H] | −0.14 | −0.07 | −0.21 |
| Radial velocity (km s-1) | −16.1 | 18.1 | 0.47 |
| Rotational velocity, vsini (km s-1) | 13.7 | 12.8 | 9.0 |
| Rotation period, P (days) | 4.4 (P/sini) | 4.7 | – |
| Li i equivalent width (mÅ) | 80.0 | 91.9 | 73.7 |
| Space velocities U,V,W (km s-1) | −17.2, −10.2, 1.1 | −13.9, −20.1, −11.1 | 14.9, −8.0, −5.7 |
Activity,  |
−4.402 | −4.48 | −4.434 |
| X-Ray luminosity, log LX/L ⋆ | −4.71 | −4.37 | −4.43 |
| Mass, M ⋆ [M⊙] | 1.28, | 0.98 | 1.02 |
| Age (Gyr) | 0.304, 0.184, 0.748(sini) | 0.530, 0.162, 0.291 | 0.385, 0.115, – |
Notes. The ages given are derived using the following methods (left to right): activity index levels, ROSAT X-Ray luminosities LX/Lbol, rotation period. For more details and references, see Sect. 4.1.
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