Table 1
Observed and inferred stellar parameters of the three stars of this study.
| Parameter | HD 103774 | HD 109271 | BD-061339 | |||||
|
|
||||||||
| Hipparcos name | HIP | 58 263 | 61 300 | 27 803 | ||||
| Spectral type | F5V | G5V | K7V / M0V | |||||
| V | [mag] | 7.12 ± 0.01 | 8.05 ± 0.01 | 9.69 ± 0.01 | (Hog 2000; Koen 2010) | |||
| B − V | [mag] | 0.503 ± 0.014 | 0.658±0.002 | 1.321 ± 0.001 | (Van Leeuwen 2007) | |||
| π | [mas] | 18.03 ± 0.52 | 16.21±0.75 | 49.23 ± 1.65 | (Van Leeuwen 2007) | |||
| d | [pc] | 55 ± 2 | 62±3 | 20 ± 1 | ||||
| MV | [mag] | 3.40 ± 0.06 | 4.1 ± 0.1 | 8.15 ± 0.07 | ||||
| Bol. Corr. | [mag] | –0.013 | –0.097 | –0.782 | (Flower 1996) | |||
| L | [L⊙] | 3.5 ± 0.3 | 2.0 ± 0.3 | 0.095 ± 0.01 | ||||
| Teff | [K] | 6489 ± 77 | 5783 ± 62 | 4324 ± 100 | (Sousa 2011; Ammons 2006) | |||
| [Fe/H] | [dex] | 0.28 ± 0.06 | 0.10 ± 0.05 | -0.14 ± 0.17 | (Sousa 2011; 23) | |||
| M∗ | [M⊙] | 1.335 ± 0.03 | 1.047± 0.024 | 0.7 | (Girardi 2000) | |||
| log g | [cgs] | 4.26 ± 0.13 | 4.28 ± 0.10 | 4.74 ± 0.02 | (Girardi 2000; Sousa 2011) | |||
| age | [Gyr] | 1.05 ± 0.64 | 7.3 ± 1.2 | 4.4 ± 4.0 | (Girardi 2000) | |||
| vsini | [km s-1] | 8.1 | 2.7 | 0.57 | (Glebocki 2005; CORAVEL) | |||
|
–4.85 ± 0.07 | –4.99 ± 0.08 | – | |||||
| Prot() |
[days] | 7 | 24 | – | (Noyes 1984) | |||
Notes.π: parallax, d: distance, MV: absolute magnitude in V, Bol. corr.: bolometric correction, L: luminosity, Teff: effective stellar temperature, M∗: stellar mass, log g: gravity at the star’s surface, vsini: projected rotational velocity of the star, : activity indicator (Noyes 1984), Prot(): star’s rotation period estimated via the activity indicator.
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