Free Access
Table 2
System parameters.
| Parameter | Symbol (Unit) | WASP-91 | WASP-105 | WASP-107 |
|
|
||||
| Stellar parameters, including from the spectra: | ||||
| Constellation | Tucana | Phoenix | Virgo | |
| Right Ascension |
|
|
|
|
| Declination |
|
|
|
|
| V mag | 12.0 | 12.1 | 11.6 | |
| K mag | 9.7 | 9.9 | 8.6 | |
| Spectral typea | K3 | K2 | K6 | |
| Stellar effective temperature | Teff (K) | 4920 ± 80 | 5070 ± 130 | 4430 ± 120 |
| Stellar surface gravity | log g∗ (cgs) | 4.3 ± 0.2 | 4.2 ± 0.2 | 4.5 ± 0.1 |
| Projected equatorial rotation velocity | v∗sinI∗/km s-1 | 2.4 ± 0.4 | 1.7 ± 1.9 | 2.5 ± 0.8 |
| Stellar metallicityb | [Fe/H] | +0.19 ± 0.13 | +0.28 ± 0.16 | +0.02± 0.10 |
| Lithium abundance | log A(Li) | <0.5 | <0.2 | <−0.3 |
|
|
||||
| MCMC proposal parameters: | ||||
| Orbital period | P (d) | 2.798581 ± 0.000003 | 7.87288 ± 0.00001 | 5.721490 ± 0.000002 |
| Epoch of mid-transit | Tc (BJD) | 2 456 297.7190 ± 0.0002 | 2 456 600.0765 ± 0.0002 | 2 456 514.4106 ± 0.0001 |
| Transit duration | T14 (d) | 0.0976 ± 0.0008 | 0.1550 ± 0.0006 | 0.1147 ± 0.0003 |
| Planet-to-star area ratio |  /R |
0.0150 ± 0.0003 | 0.0120 ± 0.0001 | 0.0217 ± 0.0002 |
| Impact parameterc | b | 0.51 ± 0.04 | 0.10 ± 0.08 | 0.09 ± 0.07 |
| Stellar reflex velocity semi-amplitude | K1 (m s-1) | 217 ± 5 | 194 ± 3 | 17 ± 2 |
| Systemic velocity | γ (m s-1) | 2782 ± 4 | 24 676 ± 2 | 14 160 ± 2 |
| Orbital eccentricity | e | 0 (adopted; <0.07 at 2σ) | 0 (adopted; <0.04 at 2σ) | 0 (adopted; <0.4 at 2σ) |
|
|
||||
| MCMC derived parameters: | ||||
| Scaled orbital separation | a/R∗ | 9.1 ± 0.3 | 17.9 ± 0.2 | 18.2 ± 0.1 |
| Orbital inclination | i (°) | 86.8 ± 0.4 | 89.7 ± 0.2 | 89.7 ± 0.2 |
| Transit ingress/egress duration | T12 = T34 (d) | 0.0139 ± 0.0009 | 0.0154 ± 0.0003 | 0.0148 ± 0.0002 |
| Stellar mass | M∗ (M⊙) | 0.84 ± 0.07 | 0.89 ± 0.09 | 0.69 ± 0.05 |
| Stellar radius | R∗ (R⊙) | 0.86 ± 0.03 | 0.90 ± 0.03 | 0.66 ± 0.02 |
| Stellar surface gravity | log g∗ (cgs) | 4.49 ± 0.03 | 4.48 ± 0.02 | 4.64 ± 0.01 |
| Stellar density | ρ∗ (ρ⊙) | 1.3 ± 0.1 | 1.23 ± 0.03 | 2.45 ± 0.05 |
| Planetary mass | MP (MJup) | 1.34 ± 0.08 | 1.8 ± 0.1 | 0.12 ± 0.01 |
| Planetary radius | RP (RJup) | 1.03 ± 0.04 | 0.96 ± 0.03 | 0.94 ± 0.02 |
| Planetary surface gravity | log gP (cgs) | 3.46 ± 0.03 | 3.64 ± 0.01 | 2.49 ± 0.05 |
| Planetary density | ρP (ρJ) | 1.2 ± 0.1 | 2.0 ± 0.1 | 0.14 ± 0.02 |
| Orbital major semi-axis | a (au) | 0.037 ± 0.001 | 0.075 ± 0.003 | 0.055 ± 0.001 |
| Planetary equil. temperatured | Teql (K) | 1160 ± 30 | 900 ± 20 | 770 ± 60 |
Notes.
(a)
Iron abundances are relative to the solar values of Asplund et al. (2009).
(b)
Spectral type estimated from Teff using the table in Gray (2008).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.