Sydney Dynamics Group Seminar: Irene De Blasi, University of Turin -- Sydney Dynamics Group Seminar

Seminar : Sydney Dynamics group Seminar.  
Day/time : Tuesday, August 11 at 02:00 PM.
Location : SMRI seminar room (A12 Macleay Room 301).  
Speaker : Irene De Blasi, University of Turin 

Title : Resonant regimes in Rings’ dynamics around small bodies of the Solar System 

Abstract.   

The presence of rings has been observed in many bodies of the solar system, including
dwarf planets, asteroids and trans-Neptunian objects.  Notably, direct observations on
such minor bodies have shown that the rotational frequency of the ring particles around
the central body often exhibits a commensurability relationship with the latter’s
rotational frequency around its axis.  In particular, such rings are located in the
so-called 1:3 Lindblad resonance.  This talk aims to present a Hamiltonian model to
describe the ring particles' motion close to specific resonances.  Using perturbation
and bifurcation theory, an analysis of the main resonances of the problem is carried on,
with a particular focus on their stability properties, including the possible presence
of bifurcations, as well as on the possible presence of KAM tori in their vicinity.  

Work in collaboration with Alessandra Celletti and Sara Di Ruzza.