Abstract Details
| Name: S. Sridhar Affiliation: RRI, Bangalore Conference ID: ASI2016_654 Title : The disruption of multiplanet systems through resonance with a binary orbit Abstract Type : Plenary Abstract : Most exoplanetary systems in binary stars are of S-type, and consist of one or more planets orbiting a primary star with a wide binary stellar companion. It is observed that: (a) Planetary eccentricities and mutual inclinations can be large; (b) There are more single-planet systems than multiplanet systems. I will report on recent work in which we present a new mechanism that could explain items (a) and (b). This mechanism relies on a resonance between the binary orbital period and the orbital precession periods of the multiplanet systems. Resonant binary forcing results in dramatic outcomes ranging from the excitation of large planetary eccentricities and mutual inclinations to disruption of the multiplanet system until just one planet remains. Processes such as planetary migration can bring an initially non-resonant system into resonance. As it does not require special physical or initial conditions, binary resonant driving is generic and may have altered the architecture of many multiplanet systems. |