Table 1
Stellar parameters of GJ 581.
| Parameter | Value | Reference |
|---|---|---|
| Identifiers | BD–07 4003 | Sch86 |
| Gl 581 | Gli69 | |
| Karmn J15194–077 | Cab16 | |
| α (J2000) | 15 19 26.83 | Gaia DR3 |
| δ (J2000) | −07 43 20.2 | Gaia DR3 |
| µα cos δ (mas yr−1) | −1221.278 ± 0.037 | Gaia DR3 |
| µδ (masyr−1) | −97.229 ± 0.027 | Gaia DR3 |
| ϖ (pc) | 158.718 ± 0.030 | Gaia DR3 |
| d (pc) | 6.3005 ± 0.0012 | Gaia DR3 |
| γ (km s−1) | +9.75 ± 0.16 | Gaia DR3 |
| U (km s−1 ) | −25.0660 ± 0.0084 | This work |
| V (km s−1) | −25.6517 ± 0.0048 | This work |
| W (km s−1) | +11.8904 ± 0.0074 | This work |
| G(a) (mag) | 9.4218 ± 0.0028 | Gaia DR3 |
| Spectral type | M3.0V | Rei95 |
| L★ (L⊙) | 0.012365 ± 0.000068 | Cif23 |
| Teff (K) | 3500±26 | Mar21 |
| log 𝑔 (cm s−2) | 4.97 ± 0.11 | Mar21 |
| [Fe/H] | −0.08 ± 0.07 | Mar21 |
| R★ (R⊙) | 0.302 ± 0.005 | This work |
| M★ (M⊙) | 0.295 ± 0.010 | This work |
| Prot (days) | 132.5 ± 6.3 | Suá15 |
| FX (10−14 erg s−1 cm−2) | 1.8 ± 0.2 | Loy16 |
| v sin i (km s−1) | < 2.0 | Rei18 |
| pEW(Hα) (Å) | +0.188 ± 0.018 | Fuh20 |
| log R′HK (b) |  |
This work |
| B (G) | 160 ± 50 | Rei22 |
| Galactic population | Young disk | This work |
Notes. (a)Photometry in passbands different from Gaia’s G from the blue (Tycho-2’s BT) to the mid-infrared (WISE’s W4) were compiled by Cifuentes et al. (2020).(b) Average log RHK′ from 563 FEROS, HARPS, HIRES, and TIGRE measurements compiled by Perdelwitz et al. (2021).
References. Sch86: Schönfeld (1886); Gli69: Gliese (1969); Rei95: Reid et al. (1995); Suá: Suárez Mascareño et al. (2015); Cab16: Caballero et al. (2016); Loy16: Loyd et al. (2016); Rei18: Reiners et al. (2018b); Fuh20: Fuhrmeister et al. (2018); Gaia DR3: Gaia Collaboration (2021); Mar21: Marfil et al. (2021); Rei22: Reiners et al. (2022); Cif23: Cifuentes (2023).
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