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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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