Gongjie Li (Georgia Tech) Obliquity Variations of Stars and Planets: Hints on the Formation and Habitability of Exoplanets

Friday, December 14, 2018
8:00 PM - 9:00 PM
Event Type
Cultural Event Featured Event
Christopher De Pree
Physics/ Astronomy Department

Title: A Song of Ice and Fire --- Dynamics of Planets Hot and Cold

Abstract: The unexpected diversity of planetary systems has posed challenges to our classical understanding of planetary formation. For instance, Jupiter sized planets have been detected with short orbital periods of a few days, misaligned with respect to the spin-axis of their host stars. I will first describe the dynamical interactions between an outer perturber and the inner planet, which naturally leads to the formation of such misaligned hot Jupiters. Next, I will discuss a similar dynamical process in the outer Solar System, far away from our Sun, which causes the observed clustering of extreme trans-Neptunian objects. This can constrain properties of possible outer planet(s), Planet Nine, in our own Solar System. 

Event is free and open to public. Complimentary parking available in West Parking Facility. For campus map and directions go to https://www.agnesscott.edu/maps-directions.html


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