Open Access
Table 3
Physical parameters for the HD 149026 system.
| Parameter | Symbol | Value (unit) |
|---|---|---|
| Stellar parameters | ||
| Age (a) | 2.60 ± 0.20 (Gyr) | |
| Effective temperature (𝑔) | Teff | 6075 (K) |
| Spectral class(c) | G0 | |
| Stellar mass (h) | M★ | 1.09 ± 0.13 (M⊙) |
| Stellar radius (h) | R★ | 1.47 (R⊙) |
| Projected rotation speed (f) | υ sin i |  (km s−1) |
| Surface gravity (b) | log 𝑔 | 4.37 ± 0.04 (cm s−2) |
| Metallicity (a) | [Fe/H] | 0.36 ± 0.08 (dex) |
| Planetary parameters | ||
| Planet mass (h) | Mp | 0.28 ± 0.03 (MJ) |
| Planet radius (h) | Rp | 0.74 ± 0.02 (RJ) |
| Equilibrium temperature (d) | Teq |  (K) |
| Planet density (h) | ρp | 0.86 ± 0.09 (g cm−3) |
| Orbital parameters | ||
| Epoch (f) | T0 |  (BJD) |
| Period (a) | P | 2.8758916 ± 0.0000014 (days) |
| Transit duration (e) | T14 | 3.23 ± 0.15 (h) |
| Systemic velocity (f) | γ |  (km s−1) |
| Radial velocity amplitude (f) | K★ | 38.3 ± 3.1 (m s−1) |
| Semi-major axis (h) | a | 0.041 ± 0.002 (AU) |
| Inclination (f) | i |  (deg) |
| Eccentricy (a) | e | <0.013 |
| Projected obliquity (f) | λ |  (deg) |
Notes. (a)Bonomo et al. (2017); (b) Stassun et al. (2017); (c)Ment et al. (2018); (d)Torres et al. (2008); (e)Albrecht et al. (2012); (f) This work;(𝑔) Gaia Collaboration (2018); (h)Spinelli et al. (2023).
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