Tidal Decay and Stable Roche-Lobe Overflow of Short-Period Gaseous Exoplanets

摘要: Many gaseous exoplanets in short-period orbits are on the verge or process of Roche-lobe overflow (RLO). Moreover, orbital stability analysis shows tides can drive many hot Jupiters to spiral inevitably toward their host stars. Thus, coupled processes evolution and RLO likely shape observed distribution close-in may even be responsible for producing some rocky planets. However, exact outcome an overflowing planet depends its internal response mass loss, accompanying act enhance inhibit RLO. In this study, we apply fully-featured robust Modules Experiments Stellar Astrophysics suite model We show that, although detailed depend several properties planetary system, it is largely determined by core gas giant. particular, find that expansion accompanies often stops reverses at a specific maximum period mass. suggest strand remnant giant near period, which provides observational prediction corroborate hypothesis giants undergo conduct preliminary comparison population small, planets consistent with picture. To extent establish indeed remnants giants, elucidate cores, remain unconstrained.