Astronomy Colloquium: Chris Nixon
Chris Nixon from the University of Leicester will be the featured speaker at a Department of Physics and Astronomy colloquium. His talk is titled, "Dynamics of Warped Discs."
Astrophysical discs are often warped, that is, their orbital planes change with radius. Discs can be warped by e.g. Lense-Thirring precession induced by a misaligned spinning black hole, or the gravitational pull of a misaligned companion. Nixon will discuss the dynamics of warped discs, provide some ideas on the role of disc 'viscosity' in their evolution, and present simulations of tilt oscillations, Kozai-Lidov oscillations and disc tearing. Finally, he will present the results of a stability analysis of the warped disc equations to derive the criteria for the warp to be unstable and the disc to separate into distinct planes.
There will be refreshments starting at 3:30 p.m.
This event is free and open to the public.
Department of Physics and Astronomy