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Table 3
K2-19 system parameters.
| Parameter | Estimate |
|
|
|
| Measured stellar parameters | |
| Effective temperature Teff [K] | 5250 ± 70 |
| Surface gravity log g∗ [cgs] | 4.50 ± 0.10 |
| Iron abundance [Fe/H] [dex] | 0.10 ± 0.05 |
| Microturbulent velocity vmic [ km s-1] | 0.8 |
| Macroturbulent velocity vmac [ km s-1] | 2.5 |
| Projected rotational velocity v sin i∗ [ km s-1] | 3.00 ± 0.50 |
| Stellar rotation period Prot [days] | 20.54 ± 0.30 |
|
|
|
| Derived stellar parameters | |
| Star mass M∗ [M⊙] | 0.918 ± 0.064 |
| Star radius R∗ [R⊙] | 0.881 ± 0.111 |
|
|
|
| K2-19b | |
| RV semi-amplitude variation Kb [ m s-1]∗ | 18.5 ± 3.0 |
| Planet/Star mass ratio | 0.00018 ± 0.00003 |
| Planet mass Mb [M⊕] | 54.4 ± 8.9 |
| Orbital period Porb,b [days] |
|
| ebcosω∗ ,b |
|
| ebsinω∗ ,b |
|
| Eccentricity eb |
|
| Argument of periapsis ω∗ ,b [deg] | 271 ± 12 |
| Epoch of periapsis Tp,b | 2 456 809.5 ± 0.1 |
|
|
|
| K2-19c | |
| RV semi-amplitude variation Kb [ m s-1]∗ |
|
| Planet/Star mass ratio |
|
| Planet mass Mc [M⊕] |
|
| Orbital period Porb,c [days] |
|
| eccosω∗ ,c |
|
| ecsinω∗ ,c |
|
| Eccentricity ec |
|
| Argument of periapsis ω∗ ,c | 275 ± 5 |
| Epoch of periapsis Tp,c | 2 456 811.55 ± 0.15 |
|
|
|
| Systemic RV | |
| FIES systemic RV γFIES [ m s-1] | 7195.64 ± 4.22 |
| HARPS-N systemic RV γHARPS−N [ m s-1] | 7327.10 ± 2.61 |
| HARPS-S systemic RV γHARPS [ m s-1] | 7311.91 ± 1.79 |
Notes. Planet parameters are from the TRADES analysis. The planet orbital parameter estimates refer to the reference time BJDTDB = 2 456 813.0.
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