Tidal decay of close planetary orbits

@article{Rasio1996TidalDO,
  title={Tidal decay of close planetary orbits},
  author={Frederic A. Rasio and Christopher A Tout and S. H. Lubow and Mario Livio},
  journal={The Astrophysical Journal},
  year={1996},
  volume={470},
  pages={1187-1191}
}
The 4.2-day orbit of the newly discovered planet around 51~Pegasi is formally unstable to tidal dissipation. However, the orbital decay time in this system is longer than the main-sequence lifetime of the central star. Given our best current understanding of tidal interactions, a planet of Jupiter's mass around a solar-like star could have dynamically survived in an orbit with a period as short as $\sim10\,$hr. Since radial velocities increase with decreasing period, we would expect to find… Expand

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