Table 1
Literature parameters for the stars discussed in the paper.
| Parameter | HD 10700 | HD 20794 | HD 102365 | HD 304636 | ||||
|---|---|---|---|---|---|---|---|---|
| G8.5V | [1] | G8V | [4] | G5 | [9] | M0 | [14]/[15] | |
| Spectral type | K0 | [2] | K0 | [2] | G8 | [2] | M1 | [2]/[16] |
| Teff [K] | 5339±19 | [2] | 5388±14 | [2] | 5652±18 | [2] | 3820±92 | [2] |
| 5618±14 | [10] | 3770±40 | [16] | |||||
| [Fe/H] | −0.51±0.01 | [2] | −0.385±0.011 | [2] | −0.3±0.01 | [2] | −0.16±0.05 | [2] |
| −0.31±0.02 | [11] | −0.16±0.09 | [15] | |||||
| log g [cm s−2] | 4.45±0.06 | [2] | 4.379±0.036 | [2] | 4.4±0.05 | [2] | 4.72±0.02 | [16] |
| ξt[km/s] | 0.67±0.04 | [2] | 0.568±0.040 | [2] | 0.98±0.03 | [2] | − | − |
| 0.7 | [9] | |||||||
| v.sin(i) [km/s] | ~1 | [3] | <3 | [4] | <2 | [2] | 2.32±0.65 | [2] |
![]() |
−4.96±0.003 | [4] | −4.976±0.003 | [4] | −4.99 | [9] | −4.94±0.01 | [2] |
| −4.90±0.01 | [2] | −5.00±0.01 | [2] | −4.88±0.01 | [2] | |||
| Prot [d] | 34 | [5] | 33.19±3.61 | [4] | 40 | [12] | 31±5 | [2] |
| 46±4 | [6] | |||||||
| π [mas] | 273.8097±0.1701 | [7] | 165.5242±0.0784 | [7] | 107.3024±0.0873 | [7] | 95.6982±0.0145 | [7] |
| d [pc] | 3.65 | [7] | 6.04 | [7] | 9.32 | [7] | 10.45 | [7] |
| 0.55±0.05 | [17] | |||||||
| Mstar[M⊙] | 0.783±0.012 | [8] | 0.70 | [4] | ![]() |
[13] | 0.53±0.05 | [15] |
| 0.48±0.03 | [16] | |||||||
| Rstar[R⊙] | 0.793±0.004 | [8] | − | − | − | − | ![]() |
[16] |
| Lstar[L⊙] | 0.488±0.010 | [8] | 0.656±0.003 | [4] | − | − | 0.046±0.0015 | [16] |
Notes. [1] Gray et al. (2006), [2] Hojjatpanah et al. (2019), [3] Gray & Baliunas (1994), [4] Pepe et al. (2011), [5] Baliunas et al. (1996), [6] Korolik et al. (2023), [7] Gaia Collaboration (2023), [8] Teixeira et al. (2009), [9] Tinney et al. (2011), [10] Meunier et al. (2022), [11] Soubiran et al. (2022), [12] Noyes et al. (1984b), [13] Aguilera-Gómez et al. (2018), [14] Koen et al. (2010), [15] Maldonado et al. (2019b), [16] DiTomasso et al. (2025), [17] Neves et al. (2013).
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![$\[\log \left(R_{H K}^{\prime}\right)\]$](/articles/aa/full_html/2025/08/aa53869-25/aa53869-25-eq1.png)
![$\[0.88_{-0.03}^{+0.02}\]$](/articles/aa/full_html/2025/08/aa53869-25/aa53869-25-eq2.png)
![$\[0.5066_{-0.0172}^{+0.0169}\]$](/articles/aa/full_html/2025/08/aa53869-25/aa53869-25-eq3.png)