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Table 2
Stellar parameters.
| TESS Object of interest TESS input catalogue TYCHO-2 | TOI-1820 TIC 393831507 TYC 1991-1863-1 | TOI-2025 TIC 394050135 TYC 4595-797-1 | TOI-2158 TIC 342642208 TYC 1577-691-1 | |
|---|---|---|---|---|
| V(a) | Tycho V magnitude | 10.90 | 11.60 | 10.89 |
| G(b) | Gaia G magnitude | 10.97 | 11.36 | 10.67 |
| αJ2000(b) | Right Ascension | 12:30:44.813 | 18:51:10.861 | 18:27:14.413 |
| δJ2000 (b) | Declination | 27:27:07.206 | 82:14:43.492 | 20:31:36.793 |
| µα (b) | Proper motion in RA (mas yr−1) | 50.54 ± 0.08 | 2.79 ± 0.04 | −44.00 ± 0.04 |
| µδ(b) | Proper motion in Dec (mas yr−1) | −33.93 ± 0.08 | −4.52 ± 0.05 | 7.89 ± 0.07 |
| ϖ(b) | Parallax (mas) | 4.00 ± 0.06 | 2.95 ± 0.02 | 5.01 ± 0.04 |
| π(b) | Distance (pc) | 250 ± 4 | 339 ± 2 | 200 ± 1 |
| Teff(c) | Effective temperature (K) | 5734 ± 50 | 5880 ± 53 | 5673 ± 50 |
| log g(c) | Surface gravity (dex) | 4.24 ± 0.05 | 4.17 ± 0.06 | 4.19 ± 0.05 |
| [Fe/H](c) | Metallicity (dex) | 0.14 ± 0.15 | 0.18 ± 0.08 | 0.47 ± 0.08 |
| v sin i* (c) | Projected rotational velocity (km s−1) | 4.5 ± 0.8 | 6.0 ± 0.3 | 3.7 ± 0.5 |
| AV(d) | Extinction (mag) | 0.04 ± 0.02 | 0.10 ± 0.03 | 0.24 ± 0.02 |
| Fbol(c) | Bolometric flux (erg s−1 cm−2) | (1.017 ± 0.018) × 10−9 | (7.02 ± 0.16) × 10−10 | (1.540 ± 0.018) × 10−9 |
| R*(d) | Radius (R⊙) | 1.51 ± 0.06 | 1.56 ± 0.03 | 1.41 ± 0.03 |
| M*(d) | Mass (M⊙) | 1.04 ± 0.13 | 1.32 ± 0.14 | 1.12 ± 0.12 |
| Prot/sin i(d) | Rotation period (days) | 25 ± 6 | 13.2 ± 0.7 | 19 ± 3 |
| Ppred (d) | Predicted rotation period (days) | 40 ± 2 | – | 43 ± 3 |
| log R′HK(e) | Activity | −5.37(e) | – | −5.06 ± 0.05 |
| τ(d) | Age (Gyr) | 11 ± 2 | 1.7 ± 0.2 | 8 ± 1 |
| ρ(d) | Density (g cm−3) | 0.43 ± 0.07 | 0.49 ± 0.06 | 0.56 ± 0.07 |
Notes. Parameters of the stellar hosts in the three systems of this study. (a) Tycho-2 (Høg et al. 2000). (b) Gaia EDR3 (Gaia Collaboration 2021). (c)This work: SPC. (d)This work: SED. (e)This work: HIRES spectra.
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