Table 1
Basic properties of the host stars.
| Parameters | LSPM J2116+0234 | GJ 686 | Ref. |
|---|---|---|---|
| Karmn(a) | J21164+025 | J17378+185 | |
| α (J2000) | 21:16:27.28 | 17:37:53.35 | Gaia |
| δ (J2000) | +02:34:51.40 | +18:35:30.16 | Gaia |
| d (pc) | 17.64 ± 0.02 | 8.16 ± 2 ⋅ 10−3 | Gaia |
| G (mag) | 10.8595 ± 8 ⋅ 10−4 | 8.7390 ± 6 ⋅ 10−4 | Gaia |
| J (mag) | 8.219 ± 0.032 | 6.360 ± 0.023 | 2MASS |
| Sp. Type | M3.0 V | M1.0 V | PMSU |
| Teff (K) | 3475 ± 51 | 3654 ± 51 | Pas18 |
| logg (cgs) | 4.95 ± 0.07 | 4.88 ± 0.07 | Pas18 |
| [Fe/H] (dex) | −0.05 ± 0.16 | −0.22 ± 0.16 | Pas18 |
| L (L⊙) | 0.0247 ± 3 ⋅ 10−4 | 0.0293 ± 7 ⋅ 10−4 | Sch19 |
| R (R⊙) | 0.431 ± 0.015 | 0.427 ± 0.017 | Sch19 |
| M⋆ (M⊙) | 0.430 ± 0.031 | 0.426 ± 0.033 | Sch19 |
| pEW (Hα) (Å) | +0.004 ± 0.005 | −0.128 ± 0.03 | Jef18 |
| vsini (km s−1) | <2 | <2 | Rei18 |
 |
⋯ | − 5.42 ± 0.05 | Sua18 |
| U (km s−1) | −23.99 ± 0.21 | −33.56 ± 0.28 | Gaia |
| V (km s−1) | −18.12 ± 0.29 | 35.40 ± 0.25 | Gaia |
| W (km s−1) | −5.24 ± 0.21 | −21.20 ± 0.17 | Gaia |
References. 2MASS: Skrutskie et al. (2006); Cor16: Cortés-Contreras (2016); Gaia: Gaia Collaboration (2016, 2018); Jef18: Jeffers et al. (2018); Rei18: Reiners et al. (2018b); PMSU: Hawley et al. (1996); Pas18: Passegger et al. (2018); Sch19: Schweitzer et al. (2019); Sua18: Suárez Mascareño et al. (2018); UCAC4: Zacharias et al. (2013).
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