Spring 2023 Schedule

Monday
Swampland Seminar: 11:00am - 12:00pm ET, bi-weekly

Tuesday
Member Seminar: 12:00pm - 1:00pm ET

Wednesday
Colloquium: 12:30pm - 1:30pm ET
New Technologies in Mathematics Seminar: 2:00pm - 3:00pm ET
Probability Seminar: 3:30pm - 4:30pm ET

Thursday
General Relativity Seminar: 9:30am - 10:30am ET
Active Matter Seminar: 1:00pm - 2:00pm ET, bi-weekly

Friday
Algebraic Geometry in String Theory Seminar: 9:00am - 10:00am ET
Quantum Matter in Mathematics and Physics Seminar: 10:00am - 11:30am ET


  • Wednesday, July 5, 2023
  • 02:00 PM
Category: General Relativity Seminar
Speaker: Suman Kundu, Weizmann Institute
Title: ‘Grey Galaxy’ as the endpoint of the Kerr-AdS super radiant blackhole
General Relativity Seminar Speaker: Suman Kundu (Weizmann Institute) Title: ‘Grey Galaxy’ as the endpoint of the Kerr-AdS super radiant blackhole Abstract: Kerr AdS$_{d+1}$ black holes for $d\geq 3$ suffer from classical superradiant instabilities over a range of masses near extremality. We conjecture that these instabilities settle down into Grey Galaxies (GG)s - a new class of solutions to Einstein's equations which we construct for $d=3$. Grey Galaxies consist of an $\omega=1$ black hole in the `centre' of $AdS$, surrounded by a uniformly thick and very large disk of thermal bulk matter that revolves around the centre of AdS at the speed of light. The parametrically low energy density and parametrically large radius of the gas disk are inversely related;...