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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.

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