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Department of Mathematical Sciences

Seminar Archives

On this page you can find information about seminars in this and previous academic years, where available on the database.

Maths HEP Lunchtime Seminars: The Endpoint of Black Ring instabilities and the weak cosmic censorship conjecture

Presented by Pau Figueras, Queen Mary

11 March 2016 13:00 in CM221

In this talk I will present concrete evidence that the weak cosmic censorship conjecture can be violated in asymptotically flat spacetimes of five dimensions. This evidence was produced by numerically evolving perturbed black rings. I will describe the evolution of perturbed black rings for the whole range of ring thicknesses. For rings of intermediate thickness we discovered a new instability which causes the ring to collapse to a black hole of spherical topology. For very thin rings the Gregory-Laflamme instability becomes dominant and eventually gives the ring a fractal structure of bulges connected by necks which become ever thinner over time. I will argue that this suggests that very thin black rings break and hence violate weak cosmic censorship.

Contact daniele.dorigoni@durham.ac.uk or jyotirmoy.bhattacharya@durham.ac.uk for more information