Table 3
Comparison of measured and inferred properties of the WASP-18 and WASP-103 UHJ systems.
System parameters | ||
---|---|---|
System | WASP-18 | WASP-103 |
Planet mass MJ | 10.43 ± 0.54 | 1.49 ± 0.09 |
Planet radius RJ | 1.17 ± 0.07 | 1.55 ± 0.05 |
Planet Teq | 2413 ± 44 K | 2508 ± 73 K |
Orbital period | 22.6 h | 22.2 h |
Stellar Teff | 6400 ± 100 K | 6110 ± 160 K |
Inferred properties | ||
Day-night contrast | >0.96 | 0.93 |
Brightness offset | −4.5° ± 0.5 | −0.3° ± 0.1 |
Planet metallicity | − 0.01 ± 0.35 | 1.36 ± 0.36 |
Dayside photosphere | 0.33 bar | 0.01 bar |
Radius anomaly | 0% | 41% |
Notes.System parameters are taken from Hellier et al. (2009); Southworth et al. (2009, 2015). Values in bold are from this work. Other inferred properties are taken from Arcangeli et al. (2018) and Kreidberg et al. (2018). Photospheric pressures are the median contributing pressures of the dayside spectra over the HST/WFC3 G141 bandpass. The radius anomaly shown is the difference inradius between the measured value and the non-inflated model as a percentage of the measured radius taken from Thorngren & Fortney (2018).
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