(CITA/Dept. of Astronomy & Astrophysics, Toronto)
The Dynamics of the Local Group
I'll discuss the past and future dynamical evolution of the Local Group based
on new constraints from the Pan Andromeda Archaeological Survey (PAndAS). The observation that M33 is warped and tidally
disturbed implies a close and recent encounter with M31. We can therefore use
this fact to constrain the proper motion of M31 and so determine the orbit of
M31 and the Milky-Way. We explore the implications for the total mass in the
Local Group and the past and future evolution of this system.