When:
Tuesday, October 11, 2016
4:00 PM - 5:00 PM CT
Where: Technological Institute, F160, 2145 Sheridan Road, Evanston, IL 60208 map it
Audience: Faculty/Staff - Student - Public - Post Docs/Docs - Graduate Students
Contact:
Pamela Villalovoz
(847) 491-3644
Group: Physics and Astronomy Astrophysics Seminars
Category: Academic
Title: Aero-Resonant Migration: a new disk migration mechanism for small plane
Speaker: Natalia Storch, Caltech
Host: Fabio Antonini
Abstract: Detailed numerical simulations have shown that Type I migration is not a reliable mode of inward migration for small exoplanets, as its magnitude and direction are extremely sensitive to the thermodynamics of the protoplanetary disk. We discuss an alternate migration mechanism, termed Aero-Resonant Migration (ARM), in which small planetesimals undergo orbital decay due to aerodynamic drag and resonantly shepherd planets ahead of them. Using a combination of analytical and numerical calculations, we show that this is a viable migration mechanism, and discuss the conditions under which it dominates. We suggest that ARM may be key to assembling compact exoplanet systems such as Kepler-80.
Keywords: Physics, Astronomy, Astrophysics