Table 4
Parameters of the WASP-19Ab system.
Parameter | Symbol | Fit | Value | Priors | |
---|---|---|---|---|---|
Assumed parameters | |||||
Stellar rotation | V sin (i) | 4.63 km s−1 (†) | |||
Stellar mass | M⋆ | 0.970 M⊙ | |||
Planet-to-star radius ratio | rp/R⋆ | 0.14248 | |||
Semi-major axis | a | 0.01655 AU | |||
First transit epoch | T0 | 2 454 775.3372 BJDTDB | |||
Adjusted parameters | |||||
Jitters | ID 1 | jit1 | RVs | 13.5 m s−1 | |
ID 2 | jit2 | RVs | 35.0 m s−1 | ||
ID 3 | jit3 | RVs | 9.8 m s−1 | ||
ID 4 | jit4 | RVs | 11.5 m s−1 | ||
ID 5 | jit5 | RVs | 30.4 m s−1 | ||
ID 6 | jit6 | RVs | 13.1 m s−1 | ||
ID 7 | jit7 | RVs | 9.8 m s−1 | ||
ID 8 | jit8 | RVs | 22.3 m s−1 | ||
Transits | jittr | Tr | 0.00005 d | ||
Occultations | jitocc | Occ | 0.0001 d | ||
Fitted parameters | |||||
Offset velocity of the system | Vγ | RVs | (20.7791 ± 0.0060) km s−1 | 𝒰 [−∞,+∞] | |
RV semi-amplitude | K | RVs | (253.48 ± 3.87) m s−1 | 𝒰 [−∞,+∞] | |
Offset instrumental velocity | |||||
ID 2 | Vinstr,2 | RVs | (0.0258 ± 0.0071)km s−1 | 𝒰 [−∞,+∞] | |
ID 3 | Vinstr,3 | RVs | (0.0221 ± 0.0074) km s−1 | 𝒰 [−∞,+∞] | |
ID 4 | Vinstr,4 | RVs | (−20.827 ± 0.016) km s−1 | 𝒰 [−∞,+∞] | |
ID 5 | Vinstr,5 | RVs | (−20.712 ± 0.014) km s−1 | 𝒰 [−∞,+∞] | |
ID 6 | Vinstr,6 | RVs | (−0.0919 ± 0.0092) km s−1 | 𝒰 [−∞,+∞] | |
ID 7 | Vinstr,7 | RVs | (−0.1149 ± 0.0139) km s−1 | 𝒰 [−∞,+∞] | |
ID 8 | Vinstr,8 | RVs | (0.0750 ± 0.0090) km s−1 | 𝒰 [-∞,+∞] | |
Anomalistic period | Pa | RVs and Tr/Occ | ![]() |
𝒰 [−∞,+∞] | |
![]() |
RVs and Tr/Occ | ![]() |
𝒰 [−1,+1] | ||
![]() |
RVs and Tr/Occ | ![]() |
𝒰 [−1,+1] | ||
Periastron precession rate | dω/dt | RVs and Tr/Occ | ![]() |
||
![]() |
𝒰 [−∞,+∞] | ||||
Stellar Love number | k2,⋆ | RVs | 0.0200 ± 0.0069 | 𝒩 (0.02;0.004) | |
Stellar temperature | Teff,⋆ | RVs | (5498.65 ± 172.86)K | 𝒩 (5500 K;100 K) | |
Planet-to-star mass ratio | q = mp/M⋆ | RVs | 0.001150 ± 0.000057 | 𝒩 (0.00115;3.3 10−5) | |
Stellar radius over semi-major axis | R⋆/a | RVs | 0.2785 ± 0.0070 | 𝒩 (0.2784;0.0040) | |
Orbital-to-rotational stellar period | F⋆ = Porb/Prot,⋆ | RVs | 0.0729 ± 0.0074 | 𝒩 (0.0729;0.0043) | |
Orbital inclination | i | RVs and Tr/Occ | (79.40 ± 0.69)° | 𝒩 (79.4;0.4) | |
Derived parameters | |||||
Eccentricity | e | ![]() |
|||
Periastron angle | ω0 | ![]() |
|||
Sidereal period | Ps | ![]() |
|||
Planetary Love number | k2,p | ![]() |
Notes. Assumed, adjusted – according to Eq. (11) – fitted parameters and their priors, and derived parameters for our model which fits RVs and transit/occultation mid-times in parallel. The third column indicates if the parameter was fitted to model radial velocity (“RV”) and/or mid-transit and mid-occultation times (“Tr/Occ”). The last column shows the results of our analysis. The offset related to ID 1 (Vinstr,1) was not included because the first dataset was used to derive the relative velocity between the observer and the center of mass of the system (Vgamma). The solutions are calculated only from those steps of the DE-MCMC that fall within the distribution around the highest peak of the posterior distribution of (see Fig. 6, solution B). Errorbars are given with 1σ confidence level. The reported values and errorbars of the sidereal period Ps, ω0 and e are not calculated – as
, arctan
and
respectively – from the reported values of
and
but from the median of the distribution resulting from the combination of the posterior distributions of
and
. (†)Hellier et al. (2011).
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