Table 1
Stellar parameters of GJ 720 A.
| Parameters | Value | Ref.(a) |
|---|---|---|
| Other name | HIP 91128 | |
| α (J2000) | 18:35:19.08 | Gaia DR3 |
| δ (J2000) | +45:44:44.4 | Gaia DR3 |
| G (mag) | 9.1050 ± 0.0005 | Gaia DR2 |
| J (mag) | 6.88 ± 0.02 | 2MASS |
| Spectral type | M0.5 V | Mald17 |
| π (mas) | 64.236 ± 0.012 | Gaia DR3 |
| d (pc) | 15.557 ± 0.006 | Bail18 |
| μα cos δ (mas yr−1) | 452.36 ± 0.01 | Gaia DR3 |
| μβ (mas yr−1) | 363.47 ± 0.01 | Gaia DR3 |
| From HARPS-N spectra | ||
| Teff (K) | 3837 ± 69 | Mald17 |
| log g (cgs) | 4.71 ± 0.05 | Mald17 |
| [Fe/H] (dex) | −0.14 ± 0.09 | Mald17 |
| M (M⊙) | 0.57 ± 0.06 | Mald17 |
| R (R⊙) | 0.56 ± 0.06 | Mald17 |
| log Lbol∕L⊙ | −1.217 ± 0.0964 | Mald17 |
| vsin i (km s−1) | 0.99 ± 0.53 | Mald17 |
 |
−5.03 ± 0.04 | Suar18 |
| Prot (days)(*) |  |
This work |
| log Lx (erg s−1) | 27.39 ± 0.15 | Gonz19 |
| logLx∕Lbol | −5.11 ± 0.18 | Gonz19 |
Notes. (a) Gaia DR3: Gaia Collaboration (2020); Gaia DR2: Gaia Collaboration (2018); 2MASS: Cutri et al. (2003); Mald17: Maldonado et al. (2017); Bail18: Bailer-Jones et al. (2018); Gonz19: González-Álvarez et al. (2019); Suar18: Suárez Mascareño et al. (2018). (*) Prot value derived from the S-index activity indicator.
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