Table 2
Stellar parameters of GJ 3470.
| Parameter | Value | Reference |
|---|---|---|
| Name and identifiers | ||
| Name | LP 424–4 | Luy79 |
| GJ | 3470 | GJ91 |
| Karmn | J07590+153 | AF15 |
| Key parameters | ||
| α | 07:59:05.84 | Gaia DR2 |
| δ | +15:23:29.2 | Gaia DR2 |
| G (mag) | 11.3537 ± 0.0013 | Gaia DR2 |
| J (mag) | 8.794 ± 0.026 | 2MASS |
| Spectral type | M2.0 V | Lep13 |
| Parallax and kinematics | ||
| π (mas) | 33.96 ± 0.06 | Gaia DR2 |
| d (pc) | 29.45 ± 0.05 | Gaia DR2 |
| μα cosδ (mas a−1) | –185.73 ± 0.11 | Gaia DR2 |
| μδ (mas a−1) | –57.26 ± 0.06 | Gaia DR2 |
| Vr (km s−1)(a) | +26.5169 ± 0.0005 | Bou18 |
| U (km s−1) | –32.04 ± 0.21 | This work |
| V (km s−1) | –12.42 ± 0.10 | This work |
| W (km s−1) | –15.37 ± 0.10 | This work |
| Kinematic population | Young disc | This work |
| Photospheric parameters | ||
| Teff (K) | 3725 ± 54 | This work |
| logg | 4.65 ± 0.06 | This work |
| [Fe/H] | +0.420 ± 0.019 | This work |
| vsini (km s−1) | ≲2 | Bon12 |
| Physical parameters | ||
| L (10−4 L⊙) | 390 ± 5 | This work |
| R (R⊙) | 0.474 ± 0.014 | This work |
| M (M⊙) | 0.476 ± 0.019 | This work |
| Age (Ga) | 0.6–3.0 | This work |
| Other parameters | ||
| Prot (d) | 20.70 ± 0.15 | Bid15 |
| pEW(Hα) (Å) | +0.39 ± 0.09 | Gai14 |
 |
–4.91 ± 0.11 | SM15 |
| F5-100 Å (1027 erg s−1) | 2.3 | Bou18 |
| F100-504 Å (1027 erg s−1) | 2.7 | Bou18 |
Notes. (a) Soubiran et al. (2018) tabulated Vr = +26.341 ± 0.004 km s−1, but their uncertainties did not include gravitational redshift or photospheric convection.
References. AF15: Alonso-Floriano et al. (2015); Bid14: Biddle et al. (2014); Bon12: Bonfils et al. (2012); Bou18: Bourrier et al. (2018); Gai14: Gaidos et al. (2014); GJ91: Gliese & Jahreiß (1991); Lép13: Lépine et al. (2013); Luy79: Luyten (1979); SM15: Suárez Mascareño et al. (2015); 2MASS: Skrutskie et al. (2006); Gaia DR2: Gaia Collaboration (2018).
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