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Table 4

Planetary and stellar parameters for the three systems here studied.

Parameter [unit] WASP-43 HAT-P-20 Qatar-2
B [mag]j 13.796 ± 0.022 12.539 ± 0.075 14.582 ± 0.022
V [mag]j 12.464 ± 0.028 11.339 ± 0.031 13.417 ± 0.023
J [mag]k 9.995 ± 0.024 9.276 ± 0.022 11.350 ± 0.026
H [mag]k 9.397 ± 0.025 8.743 ± 0.021 10.794 ± 0.022
K [mag]k 9.267 ± 0.026 8.601 ± 0.019 10.619 ± 0.021
Space velocity (U,V,W) [km s-1] (–2.7, –10.8, –20.4) (19.1, –27.7, –2−1.4) –
Stellar spectra characterization
Effective temperature, Teff [K] 4500 ± 100 4595 ± 45 4640 ± 65
Surface gravity, log g⋆ [cm s-2] 4.50 ± 0.20 4.52 ± 0.09 4.51 ± 0.12
Iron abundance, [Fe/H] −0.01 ± 0.15 0.22 ± 0.09 0.13 ± 0.10
Microturbulence vel. , ξmic [km s-1] 1.00 ± 0.15 0.74 ± 0.27 0.90 ± 0.35
Macroturbulence vel. , ξmac [km s-1] l 2.03 2.17 2.24
Proj. rot. vel., VsinI⋆ [km s-1] 2.6 ± 0.5 2.0 ± 0.5 2.0 ± 1.0
⟨MW S-index⟩ 1.647 ± 0.059 1.20 ± 0.13 –
⟨log()⟩ –4.35 ± 0.10 −4.40 ± 0.06 –
RV and photometric data fit
Star mass, M⋆ [M⊙] 0.688 ± 0.037 0.742 ± 0.042 0.798 ± 0.040
Planet mass, Mp [MJ] 1.998 ± 0.079 7.22 ± 0.36 2.616 ± 0.071
Star radius, R⋆ [R⊙] 0.6506 ± 0.0054 0.6796 ± 0.0054 0.793 ± 0.024
Planet radius, Rp [RJ] 1.006 ± 0.017 1.025 ± 0.053 1.281 ± 0.039
Orbital period, P [day] 0.813473978 ± 0.000000035a 2.875316938 ± 0.00000019 1.33711647 ± 0.00000026 f
Eccentricity, e 0 (fixed) 0.0172 ± 0.0016 0 (fixed)
Longitude of periastron, ω [deg] 90 (fixed) 342.7 ± 7.3 90 (fixed)
Orbital inclination, ip [deg] 82.109 ± 0.088 86.88 ± 0.31 86.12 ± 0.08 f
Epoch of periastron, τ [BJD] – 2455942.681 ± 0.016 –
Barycentric RV, γ [m s-1] −3595.5 ± 4.3 b −18087.44 ± 0.7 g –23977.5 ± 7.1
Barycentric RV, γ2 [m s-1] −3588.1 ± 2.7 c −18093.36 ± 0.8g –
Proj. spin-orbit angle, λ [deg] 3.5 ± 6.8 –8.0 ± 6.9 15 ± 20
Proj. rot. vel., VsinI⋆ [km s-1] 2.26 ± 0.54 1.85 ± 0.27 2.09 ± 0.58
Stellar rotational period, Prot [day] 15.6 ± 0.4d 14.48 ± 0.02e 18.77 ± 0.29
Derived parameters
Orbital semi-major axis, a [AU] 0.01504 ± 0.00029 0.03593 ± 0.00029 0.02205 ± 0.00037
Transit duration, T14 [day] 0.0485 ± 0.010 0.07900 ± 0.00052 –
Impact parameter, b 0.689 ± 0.013 0.622 ± 0.059 0.405 ± 0.028
a/R⋆ 4.97 ± 0.14 11.36 ± 0.25 5.98 ± 0.28
Rp/R⋆ 0.1588 ± 0.0040 0.155 ± 0.010 0.166 ± 0.010
Spin-orbit angle Ψ [deg] <20i 36 <43i
Star incl. angle I⋆ [deg] >72i 53 ± 12 >58i
RV-curve semi-amplitude, K [m s-1] 551.0 ± 3.2 1249.5 ± 1.2 558.7 ± 5.9 h
Star density, ρ⋆ [g cm-3] 2.526 ± 0.080 2.36 ± 0.16 2.240 ± 0.023 f
Star surface gravity, log g⋆ [cm s-2] 4.647 ± 0.011 4.643 ± 0.020 4.541 ± 0.048
Planet density, ρp [g cm-3] 2.43 ± 0.14 8.31 ± 0.38 1.54 ± 0.20
Planet surface gravity, log gp [cm s-2] 3.696 ± 0.018 4.231 ± 0.019 3.597 ± 0.038
Planet equilibrium temperature, Tp [K] 1426.7 ± 8.5 964 ± 10 1342 ± 15

Notes.

(a)

Adopted from Hoyer et al. (2016);

(b)

CORALIE data;

(c)

HARPS-N data;

(d)

adopted from Hellier et al. (2011);

(e)

value adopted from Granata et al. (2014), error derived by us with an independent re-analysis of the data;

(f)

adopted from Mancini et al. (2014);

(g)

off-transit (γ) and in-transit (γ2) HARPS-N data;

(h)

adopted from Bryan et al. (2012);

(i)

at the 68% level of confidence.

(j)

APASS catalogue (Henden et al. 2016);

(k)

2MASS catalogue (Cutri et al. 2003)

(l)

fixed to the values obtained following Valenti & Fischer (2005).

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