School of Physics Colloquia

Thursday 14 December 2017

Associate Professor Daniel Fabrycky, University of Chicago
Constraining planetary histories with new architectures: resonant chains and circumbinary orbits

Abstract: Besides discovering thousands of planetary systems orbiting other stars, one of the legacies of NASA's Kepler mission is the discovery of new planetary architectures. Systems of up to seven planets have been found with orbital periods near integer ratios, librating in three-body resonances. These features point to disk migration into their current orbits and a history of tidal dissipation in the planets over the lifetime of the star. Separately, gas giant planets have been found in orbit around binary star systems, at a location just barely stable against dynamical ejection. Such a location would have been hostile to formation, and models of migration from a further-out birthplace are favoured and are now becoming testable.

11.00am, Slade Lecture Theatre, Physics Building A28

Cake and coffee are served at all School Colloquia.

Future Colloquia

TBA for 2018