Speaker
Hsin-Min Liu
(NTHU)
Description
Long-term transit follow-up observations sometimes show Transit Timing
Variations (TTVs), which can provide clues to understanding the
evolution of the planetary system. We study an exoplanet WASP-18Ab which
has a mass about 10.43 Jupiter Mass and an orbital period 0.94 day only.
It is expected to experience the tidal interaction with its central
star, and shrink down its orbit. We fit the mid-transit times from light
curves obtained by TESS, CHEOPS, and also published literature data. Our
results indicate that (i) the orbit of WASP-18Ab is not decaying, (ii)
the TTVs of WASP-18Ab cannot be explained by the apsidal precession
model, and (iii) the models with sinusoidal variations provides a better
fit to the mid-transit times.
| Section | Solar System/Exoplanets |
|---|
Primary author
Hsin-Min Liu
(NTHU)
Co-authors
Prof.
Ing-Guey Jiang
(NTHU)
Prof.
Li-Chin Yeh
(NTHU)
